Question

Question 139

Fill in the blank to make the statement true.

A number, for which the sum of all its factors is equal to twice the number, is called a ___ number.

Answer 1

Perfect
By definition, a number, for which the sum of all its factors excluding the number itself is equal to twice the number, is called perfect number.
Examples:
(i) 6 (smallest perfect number) = 1+ 2+ 3
(ii) 28 = 1+2+3+4+7+14