回複：回複：印尼奧賽題（1星）to aceonriver

來源: 於 2009-11-05 00:22:37 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：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)