Question

Is 18 a perfect number? Give reasons.

Answer 1

Answer:

18 isn't a perfect number

Answer 2

A number is perfect if the sum of its proper factors is equal to the number. lf If the sum of the factors is equal to 18, then 18 is a perfect number. 1 + 2 + 3 + 6 + 9 = 6 + 6 + 9 = 12 + 9 = 21. Therefore, 18 is not perfect.