The factors are 1, 2, 3, 6, 9, 18
To find something in common, you need another set of factors to compare these to.
Since 18 is a factor of 54, all of its factors are common.
The common factors of 18 and 36 are 18,9,6,3,2,1.
Since 18 is a factor of 54, all of its factors are common.
Since 18 is a factor of 180, all of its factors are common.
Common factors of 18 and 20 are: 1 and 2.
Since 18 is a factor of 108, all of its factors are common, i.e. 1,2,3,6, 9 and 18.
Since 6 is a factor of 18, all of its factors are common.
The factors of 18 are 1, 2, 3, 6, 9, 18. For them to be common, they need to be compared to another set of factors.
1 and 2 all the common factors of 64,12,18
66
The common factors are: 1, 2, 3, 6
The common positive integer factors of 18 and 30 are: 1, 2, 3, 6