Question

8. What is a perfect number? Are all perfect numbers even?​

Answer 1

Answer:

Perfect number, a positive integer that is equal to the sum of its proper divisors. ... The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.

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Answer 2

Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128. The discovery of such numbers is lost in prehistory.

Two millennia later, Euler proved that all even perfect numbers are of this form. ... It is not known whether there are any odd perfect numbers, nor whether infinitely many perfect numbers exist. The first few perfect numbers are 6, 28, 496 and 8128 (sequence A000396 in the OEIS).

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