说明：  如果一个数恰好等于它的因子之和，则称该数为“完全数”。 *题目分析与算法设计 根据完全数的定义，先计算所选取的整数a(a的取值1~1000)的因子，将各因子累加于m，若m等于a，则可确认a为完全数。 *
(if it is equal to the sum of the factor, says the number of "totally few."* Topic analysis and algorithm design based on the definition of full, first calculated by a selection integer (a value of 1 ~ 1000) factor, the factor will accumulate in m, if m = a, can be recognized for a number of completely.*)