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  2. 24 (number) - Wikipedia

    en.wikipedia.org/wiki/24_(number)

    24 is an even composite number, a highly composite number, an abundant number, a practical number, and a congruent number.The many ways 24 can be constructed inspired a children's mathematical game involving the use of any of the four standard operations on four numbers on a card to get 24 (see 24 Game).

  3. Composite number - Wikipedia

    en.wikipedia.org/wiki/Composite_number

    Every composite number can be written as the product of two or more (not necessarily distinct) primes. [2] For example, the composite number 299 can be written as 13 × 23, and the composite number 360 can be written as 2 3 × 3 2 × 5; furthermore, this representation is unique up to the order of the factors.

  4. Highly composite number - Wikipedia

    en.wikipedia.org/wiki/Highly_composite_number

    A highly composite number is a positive integer that has more divisors than all smaller positive integers. If d(n) ... 24 × 420 28 × 360: 30 × 336 32 ...

  5. List of types of numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_numbers

    Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.

  6. Table of divisors - Wikipedia

    en.wikipedia.org/wiki/Table_of_divisors

    a composite number has more than just 1 and itself as divisors; that is, d(n) > 2; a highly composite number has a number of positive divisors that is greater than any lesser number; that is, d(n) > d(m) for every positive integer m < n. Counterintuitively, the first two highly composite numbers are not composite numbers.

  7. Superior highly composite number - Wikipedia

    en.wikipedia.org/wiki/Superior_highly_composite...

    24 2 ⋅ 6 ⋅ 30 : 7 2520: 2 3 ⋅ 3 2 ⋅ 5 ⋅ 7 : 3,2,1,1 48 ... 120 is another superior highly composite number because it has the highest ratio of divisors to ...

  8. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    A prime number (or prime) is a ... smaller than 10 24, ... digits changed to any other value will always result in a composite number. 294001, 505447, 584141, 604171 ...

  9. Fermat number - Wikipedia

    en.wikipedia.org/wiki/Fermat_number

    As of 2024, it is known that F n is composite for 5 ≤ n ≤ 32, although of these, complete factorizations of F n are known only for 0 ≤ n ≤ 11, and there are no known prime factors for n = 20 and n = 24. [5] The largest Fermat number known to be composite is F 18233954, and its prime factor 7 × 2 18233956 + 1 was discovered in October 2020.