gwd-m-19

sunjueliang

Gwd 9-19,

Is the integer n odd?

1, n is divisible by 3.

2, 2n is divisible by twice as many positive integers as n.

answer B:

请NN解释一下B什么的干活？

observer

此题以前讨论过，B 的意思是2n的 factor-因子数 是 n 的二倍.

sunjueliang

谢谢！！！！