Java small test seeks to complete the number within 1000

Test question:

If a number is exactly equal to the sum of its factors, the number is called a perfect number. Example 6＝1＋23. Program to find all perfect numbers within 1000.

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Idea:

• for loop, Assign i a value of 1~1000
  

• Find the numbers that can divide i and add them
  

• After adding If the sum of the numbers is equal to i, then output i
  

Implementation code:

package com.thz.hnstc.test01;
/*
* @author NanTang
* */
public class PerfectNumber {
    public static void main(String[] args) {
        for (int i = 1; i < 1000; i++) {
            int sum = 0;
            for (int j = 1; j < i; j++) {
                if(i % j == 0)
                    sum += j;
            }
            if(sum == i)
                System.out.println("完数："  + i);
        }
    }
}

Running result:

完数：6
完数：28
完数：496

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