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2, 5, 10, 25
1, 29
1, 31
They are: 2 and 11
1, 2, 11 and 22
1, 7, 13, 91.
1, 3, 11, 33.
1, 3, 7, and 21 are.
1 x 200, 2 x 100, 4 x 50, 5 x 40, 8 x 25, 10 x 20
1, 2, 4, 8, 16.
Its prime factors are 2 and 3
1, 2, 4, 31, 62, 124.
1, 2, 4, 5, 10, and 20