Multifactorial Calculator

  • Enter a number (n) in the input field.
  • Click the "Calculate Factorials" button to calculate factorials.
  • The results will be displayed as a bar chart below.
  • Detailed calculation and formulas will also be shown.
  • Your calculation history will appear in the Calculation History section.
  • Click the "Copy" button to copy the chart as an image.
  • Click the "Clear" button to clear the chart and history.
Calculation History:


    1. Definition and Basic Concept:
      • A multifactorial is a generalization of the factorial operation. In mathematics, the factorial of a non-negative integer n, denoted as n!, is the product of all positive integers less than or equal to n.
      • The multifactorial of a number extends this concept by skipping a fixed number of steps. It is denoted as n!(k) where k is the step size. For example, n!(3) means you multiply n by every third number below it.
    2. Calculation Method:
      • For a given n and a step size k, the multifactorial n!(k) is calculated as n×(nk)×(n−2k)×… until the next term is less than or equal to 0.
    3. Examples:
      • 10!(2) would be 10×8×6×4×2.
      • 9!(3) would be 9×6×3.

    The Multifactorial Calculator

    1. Functionality:
      • Users input two values: the number n and the step size k.
      • The calculator computes n!(k) based on these inputs.
    2. Benefits of Using the Calculator:
      • Saves time and reduces the likelihood of manual calculation errors.
      • Useful for educational purposes, allowing students to explore the concept of multifactorials.
      • Assists in complex calculations that would be cumbersome to do by hand.

    Mathematical Principles Behind Multifactorials

    1. General Formula:
      • The multifactorial of n with a step size k is given by: n!(k)=n×(nk)×(n−2k)×…
      • The process stops when nik<1 for some i.
    2. Special Cases and Properties:
      • When k=1, the multifactorial reduces to the standard factorial.
      • If n<k, then n!(k)=n.
      • Multifactorials share some properties with standard factorials, like being undefined for negative integers.
    3. Combinatorial Interpretations:
      • Multifactorials can be used in combinatorial problems where elements are chosen in steps rather than individually.
    4. Relationship with Other Mathematical Concepts:
      • Multifactorials have connections to gamma functions and binomial coefficients in advanced mathematical contexts.

    Applications of Multifactorials

    1. In Mathematics and Combinatorics:
      • Useful in certain counting problems and permutation challenges.
      • Can be applied in series and sequences with step-based patterns.
    2. In Computer Science and Algorithm Design:
      • Multifactorials can be useful in algorithm design, especially in recursive functions and complex loop structures.
    3. Educational Tool:
      • Aids in teaching advanced factorial concepts and their applications.

    Interesting Facts and Further Exploration

    1. Historical Context:
      • The concept of factorial has been around since the early 19th century, but multifactorials are a more recent exploration in mathematics.
    2. Advanced Topics:
      • Connections to hyperfactorials, superfactorials, and other factorial-type functions.
      • Research into the asymptotic behavior and analytical properties of multifactorials.
    3. Challenges and Open Problems:
      • While factorials are well-studied, multifactorials present unique challenges and open problems in number theory and combinatorics.


    The multifactorial calculator provides a useful tool for computing the multifactorials of numbers. Understanding the underlying principles and applications of multifactorials can enhance one’s mathematical knowledge and problem-solving abilities. This tool serves not only as a computational aid but also as an educational resource for those exploring advanced mathematical concepts.

    Last Updated : 27 February, 2024

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    20 thoughts on “Multifactorial Calculator”

    1. The multifactorial calculator seems like a valuable tool, especially for educational purposes. It can make learning multifactorials more interactive and engaging.

    2. The historical context and advanced topics section adds depth to the understanding of multifactorials. The article provides a comprehensive overview of the topic.

    3. Absolutely, Heather! It’s essential to have such resources that contribute to a deeper understanding of mathematical concepts.

    4. The multifactorial concept does lead to intriguing open problems in number theory and combinatorics. It’s exciting to see the challenges presented by multifactorials.

    5. This is a fascinating topic! I never knew there was a concept called multifactorial. The article explains it well and the calculator sounds like a time-saver.

    6. The multifactorial calculator certainly has the potential to enhance understanding in mathematical concepts. It’s a great educational resource.

    7. This article has shed light on multifactorials and their applications. The examples provided make it easier to grasp the concept.

    8. The mathematical principles behind multifactorials are intriguing. It’s interesting how multifactorials are connected to advanced mathematical concepts.

    9. I completely agree, Vallen! I’m excited to explore more about multifactorials and its applications.

    10. I never thought about multifactorials in relation to computer science and algorithm design. It’s fascinating to see the various applications of this concept.

    11. The multifactorial concept has me intrigued. The article raises interesting points on multifactorials and their applications.

    12. Indeed, Oliver Bennett. I’m looking forward to exploring more about multifactorials after reading this article.

    13. The multifactorial concept certainly presents an interesting avenue for mathematical exploration. The article provides a solid introduction to multifactorials.

    14. Absolutely, Lucas Clark! The multifactorial concept appears to have rich historical ties and ongoing research.

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