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Problem 1069 --C语言程序设计教程(第三版)课后习题6.7

1069: C语言程序设计教程(第三版)课后习题6.7

Time Limit: 10 Sec  Memory Limit: 128 MB
Submit: 124  Solved: 83
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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

1000

Sample Output

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 

Source

 

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