4 = 2 x 2
48 = 2 x 2 x 2 x 2 x 3
41 = 41
18 = 2 x 3 x 3
28 = 2 x 2 x 7
45 = 3 x 3 x 5
40 = 2 x 2 x 2 x 5
11 = 11
46 = 2 x 23
31 = 31
44 = 2 x 2 x 11
38 = 2 x 19
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