wanshu

代码说明：

说明：  一个数如果恰好等于它的因子之和，这个数就称为“完数”，编写程序找出2～5000中的所有完数。(If a number is just equal to the sum of its factors, this number is called " complete number" , written procedures to identify 2 to 5000 in the number of all finished.)