Perfect Numbers

An integer $n$ greater than zero is perfect if its equal to the sum of its divisors (except itself). Therefore, $6$ is perfect since the sum of its divisors (but itself) is $1 + 2 + 3 = 6$ . In contrast, $8$ is not perfect since $1 + 2 + 4 = 7$ which is diferent from $8$ .

Write a function @is_perfect_number(n)@ that given the integer number $n$ greater than zero determines if $n$ is perfect or not.

Observation

Until 2016 only 49 perfect numbers were known! Probably the same number that are known nowadays!

Sample session

Problem information

Author: InfBesos

Generation: 2026-01-25T17:05:32.848Z