一个数如果恰好等于它的因子之和，这个数就称为“完数”。例如6=1＋2＋3.编程 　　　 找出1000以内的所有完数。 -If just a few of the factors equal to it and that this number is called the " End of a few." For example 6 = 1+2+3. 1000 program to find all finished within a few.