Just 1.
The factors of 31 are: 1, 31 The factors of 49 are: 1, 7, 49
31 is a prime number and has no factors other than 1 and itself. The factors of 49 are 1, 7, and 49.
Common factors of 49 and 196 are 1, 7, and 49.
The factors of 49 are 1, 7 and 49. For them to be common, they need to be compared to another set of factors.
The common factors of 49 and 35 are: 1 and 7
The common factors of 28 and 49 are 1 and 7.
Factors of 49 are 1, 7, and 49. Factors of 14 are 1, 2, 7, and 14. The common factors of 49 and 14 are 1 and 7.
49 and 100 share no common factors aside from 1.
49 and 18 share no common factors aside from 1.
Common factors of 49 and 77 are: 1 and 7.
The factors of 14 are: 1, 2, 7, 14 The factors of 49 are: 1, 7, 49 The common factors are: 1, 7
The factors of 49 are 1, 7 and 49. In order for them to be common, they need to be compared to another set of factors.