2 goes in 17 times
3 doesn't go in evenly
4 doesn't go in evenly
5 doesn't go in evenly
6 doesn't go in evenly
7 doesn't go in evenly
8 doesn't go in evenly
9 doesn't go in evenly
10 no good
11 no good
12 no good
13 no good
14 no good
15 no good
16 no good
17 * 2