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  2. Unitary perfect number - Wikipedia

    en.wikipedia.org/wiki/Unitary_perfect_number

    A unitary perfect number is an integer which is the sum of its positive proper unitary divisors, not including the number itself. (A divisor d of a number n is a unitary divisor if d and n/d share no common factors). The number 6 is the only number that is both a perfect number and a unitary perfect number.

  3. 6 - Wikipedia

    en.wikipedia.org/wiki/6

    A hexagon also has 6 edges as well as 6 internal and external angles. 6 is the second smallest composite number. [1] It is also the first number that is the sum of its proper divisors, making it the smallest perfect number. [2] 6 is the first unitary perfect number, since it is the sum of its positive proper unitary divisors, without including ...

  4. List of Mersenne primes and perfect numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_Mersenne_primes...

    Perfect numbers are natural numbers that equal the sum of their positive proper divisors, which are divisors excluding the number itself. So, 6 is a perfect number because the proper divisors of 6 are 1, 2, and 3, and 1 + 2 + 3 = 6. [2] [4]

  5. Perfect number - Wikipedia

    en.wikipedia.org/wiki/Perfect_number

    Illustration of the perfect number status of the number 6. In number theory, a perfect number is a positive integer that is equal to the sum of its positive proper divisors, that is, divisors excluding the number itself. For instance, 6 has proper divisors 1, 2 and 3, and 1 + 2 + 3 = 6, so 6 is a perfect number. The next perfect number is 28 ...

  6. Unitary divisor - Wikipedia

    en.wikipedia.org/wiki/Unitary_divisor

    The number of bi-unitary divisors of n is a multiplicative function of n with average order ⁡ where [3] = ((+)) . A bi-unitary perfect number is one equal to the sum of its bi-unitary aliquot divisors. The only such numbers are 6, 60 and 90.

  7. Category:Perfect numbers - Wikipedia

    en.wikipedia.org/wiki/Category:Perfect_numbers

    Unitary perfect number This page was last edited on 5 October 2021, at 03:36 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...

  8. Gloucestershire plans to postpone local elections - AOL

    www.aol.com/news/gloucestershire-plans-postpone...

    Gloucestershire County Council is applying to the government to postpone its elections in May 2025. It comes as the county prepares to form a unitary 'super council' which would see district and ...

  9. Multiply perfect number - Wikipedia

    en.wikipedia.org/wiki/Multiply_perfect_number

    A unitary multi 2-perfect number is naturally called a unitary perfect number. In the case k > 2, no example of a unitary multi k -perfect number is yet known. It is known that if such a number exists, it must be even and greater than 10 102 and must have more than forty four odd prime factors.