该程序代码实现的功能是判断一个数是不是完数。一个正整数的因子是所有可以整除它的正整数。而一个数如果恰好等于除它本身外的因子之和，这个数就称为完数。-The function of the program code is whether a number is the number.A positive integer factors are all positive integer can be divided exactly by it.But if a number equals the besides itself, the factor, the sum of the number is called out.