1,2,3,5,6,7,10,14,15,21,30,35,42,70,105和210有几个质数
问题描述:
1,2,3,5,6,7,10,14,15,21,30,35,42,70,105和210有几个质数
答
4个,分别是2,3,5,7
答
5个
答
4个质数,2,3,5,7.
答
2,3,5,7,
就这4个