Perfect Number

Easy

A perfect number equals the sum of its positive divisors excluding itself. Given an integer n, return true if it is a perfect number.

Example 1

Input:  n = 28
Output: true
Explanation: 28 = 1 + 2 + 4 + 7 + 14.

Example 2

Input:  n = 7
Output: false

Constraints

• 1 <= n <= 10^8