Prime Factorization
18
2 x 3 x 3
15 & 21
3
3 & 10
30/40
3/4
10/9
1 1/9
45
3 x 3 x 5
24 & 32
8
6 & 8
24
20/32
5/8
42/10
4 1/5
72
2 x 2 x 2 x 3 x 3
18 & 36
18
9 & 12
36
16/24
2/3
18/3
6
180
2 x 2 x 3 x 3 x 5
45 & 60
15
2, 7, & 8
56
28/35
4/5
41/3
13 2/3
270
2 x 3 x 3 x 3 x 5
7, 35, and 49
7
12, 16, & 18
144
52/65
4/5
192/9
21 1/3