題目：一個數如果恰好等於它的因子之和，這個數就稱為“完數”。例如6=1＋2＋3.程式設計
//   找出1000以內的所有完數

using System;
using System.Collections.Generic;
using System.Text;

namespace Sf_13
{
    class Program
    {
        static void Main(string[] args)
        {
                int []  k = new int [110];
                int n = 0;
                int sum = 0;
                int j = 0;
                for (int i = 2; i <= 1000; i++)
                {
                    n = 0;
                    sum = i;
                    for (j = 1; j < i; j++)
                    {
                        if (i % j == 0)
                        {
                            k[n] = j;
                            n++;
                            sum = sum - j;
                        }
                    }
                    if (sum == 0)
                    {
                        Console.WriteLine(j);
                    }
                }
        }
    }
}