Since 26 is a factor of 78, all the factors of 26 are common to 78.
The common factors of 78 and 84 are 1, 2, 3 and 6.
Common factors of 78 and 14 are: 1 and 2.
The common factors of 55 and 99 are: 1 and 11
The common factors of 55 and 80 are 1 and 5
Factors of 25 are 1, 5, and 25. Factors of 55 are 1, 5, 11, and 55. The common factors of 25 and 55 are 1 and 5.
The common factors of 52 and 78 are 1, 2, 13 and 26.
The factors of 78 are 1, 2, 3, 6, 13, 26, 39, 78. For them to be common, they need to be compared to another set of factors.
The factors of 55 are 1, 5, 11 and 55. For them to be common, they need to be compared to another set of factors.
Common factors of 78 and 65 are: 1 and 13.
The common factors of 44 and 55 are: 1 and 11
The common factors of 55 and 88 are: 1 and 11.