No number has all of the same factors as another number.
21, 22, 23, 24, 25, 26, 27, 28 and 29 have 1 in common.
21 and 28 share 1 and 7.
22, 24, 26, and 28 share 1 and 2.
24 and 28 share 1, 2 and 4
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1, 2 and 4
The factors of 20 are: 1, 2, 4, 5, 10, 20 The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56
1, 2, 4, 5, 10, 20 1, 2, 4, 7, 14, 28
1,2,4,5,10,201,2,4,7,14,28The factors of 20 are: 1 2 4 5 10 20The prime factors are: 2 x 2 x 5 & The factors of 28 are: 1 2 4 7 14 28The prime factors are: 2 x 2 x 7
The common factors of 12 and 28 are 1, 2 and 4