回复：回复：印尼奥赛题（1星）to aceonriver

来源: 于 2009-11-05 00:22:37 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

even if you count 1 and itself, it would be 4 even divisor (2,2,2,itself)and 5 odd divisor(3,3,7,31,1)