240,1
120,2
80,3
60,4
48,5
40,6
30,8
24,10
20,12
16,15
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10x1 1x105x22x5
1x6, 2x3
A way to show factor pairs in a list of all the factors of a number. A factor rainbow can be used to check whether a list of factors is correct.
The factors of 240 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 48, 60, 80, 120, 240.The factor pairs of 240 are: 1 x 240, 2 x 120, 3 x 80, 4 x 60, 5 x 48, 6 x 40, 8 x 30, 10 x 24, 12 x 20, 15 x 16.
The factor pairs of 28 are :28,114,27,4