Package g0501_0600.s0507_perfect_number

Class Solution

java.lang.Object
g0501_0600.s0507_perfect_number.Solution
public class Solution extends java.lang.Object
507 - Perfect Number.

Easy

A perfect number is a positive integer that is equal to the sum of its positive divisors , excluding the number itself. A divisor of an integer x is an integer that can divide x evenly.

Given an integer n, return true if n is a perfect number, otherwise return false.

Example 1:

Input: num = 28

Output: true

Explanation: 28 = 1 + 2 + 4 + 7 + 14 1, 2, 4, 7, and 14 are all divisors of 28.

Example 2:

Input: num = 7

Output: false

Constraints:

  • 1 <= num <= 108

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    checkPerfectNumber(int num)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • checkPerfectNumber

      public boolean checkPerfectNumber(int num)