1 and 7
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the factors of 7 are 1 and 7
The prime factors of 147 are 3, 7 and 7. From those we can create all the other factors ... (3 x 7) and (7 x 7) which are 21 and 49. 1 is a factor of every number, and every number is a factor of itself. So all the factors of 147 are 1, 3, 7, 7, 21, 49 and 147
all the factors are 14:1, 2, 7, 14 21:1, 3, 7, 21
The factors of 14 are: 1, 2, 7, 14 The factors of 49 are: 1, 7, 49 The common factors are: 1, 7 The Greatest Common Factor: GCF = 7
1 7 49