Example: 30 and 42
The factors of 30 are:
1, 2, 3, 5, 6, 10, 15, 30
The factors of 42 are:
1, 2, 3, 6, 7, 14, 21, 42
The common factors are:
1, 2, 3, 6
The factors of 13 are 1 and 13. For them to be common, they need to be compared to another set of factors.
The factors of 7 are 1 and 7. For them to be common, they need to be compared to another set of factors.The factors of 7 are 1 and 7. For them to be common, they need to be compared to another set of factors.
The factors of 12 are 1,2,3,4,6 and 12. For them to be common, they need to be compared to another set of factors.
The factors of 12 are 1,2,3,4,6 and 12. For them to be common, they need to be compared to another set of factors.
The factors of 18 are 1,2,3,6,9 and 18. For them to be common, they need to be compared to another set of factors.
The factors of 67 are 1 and 67. For them to be common, they need to be compared to another set of factors.
The factors of 89 are 1 and 89. For them to be common, they need to be compared to another set of factors.
The factors of 11 are 1 and 11. For them to be common, they need to be compared to another set of factors.
The factors of 18 are 1,2,3,6,9 and 18. For them to be common, they need to be compared to another set of factors.
The factors of 17 are 1 and 17. For them to be common, they need to be compared to another set of factors.
The factors of 311 are 1 and 311. For them to be common, they need to be compared to another set of factors.
By comparing its set of factors to another set of factors.