3, 7, 21.
3x7 is the only equation that equals 21, and so these are the only factors of 21.
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1 3 7 21 49 147.
18 and 3 are factors of 162.
The factors of 21 are: 1, 3, 7, 21The factors of 35 are: 1, 5, 7, 35The common factors are: 1, 7
Factors for 147: 1, 3, 7, 21, 49, 147 Factors for 294: 1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 294 Common Factors: 1, 3, 7, 21, 49, 147
21=1,3,7,21