Question

what is perfect number?are all perfect number are even?​

Answer 1

Answer:

Equivalently, a perfect number is a number that is half the sum of all of its positive divisors including itself i.e. σ1(n) = 2n. For instance, 28 is perfect as 1 + 2 + 4 + 7 + 14 + 28 = 56 = 2 × 28. ... It is not known whether there are any odd perfect numbers, nor whether infinitely many perfect numbers exist

Answer 2

Answer:

$Perfect Number:$

A positive integer that is equal to the sum of its proper divisors.

$Example:$

The smallest perfect number is 6, which is the sum of 1, 2, and 3.

Other perfect numbers are 28, 496, and 8,128.