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#2
九转星河2016-12-18 04:44
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题目:一个数如果恰好等于它的因子之和,这个数就称为"完数"。
intput:N
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