2615: C语言程序设计教程(第三版)课后习题6.7

Memory Limit:128 MB Time Limit:10.000 S
Judge Style:Text Compare Creator:
Submit:1 Solved:1

Description

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的因子为1、2、3,而6=1+2+3,因此6是"完数"。 编程序找出N之内的所有完数,并按下面格式输出其因子:

Input

N

Output

? its factors are ? ? ?

Sample Input Copy

1000

Sample Output Copy

6 its factors are 1 2 3 
28 its factors are 1 2 4 7 14 
496 its factors are 1 2 4 8 16 31 62 124 248