1 and 2
Common factors of 18 and 20 are: 1 and 2.
1 and 2 are factors common to 6 and 20
1 and 5
1, 2 and 4
The factors of 20 are:1, 2, 4, 5, 10, 20The factors of 36 are:1, 2, 3, 4, 6, 9, 12, 18, 36The common factors are:1, 2, 4
There are not common factors of 14. Common factors are factors that it and another number share - factors they have in common. A single number cannot have common factors. 14 does have factors. Its factors are 1, 2, 7, and 14. 14 and 16 have common factors of 1 and 2. 14 and 21 have common factors of 1 and 7. 14 and 31 have a common factor of 1 only, which means they are relatively prime. 14 and 70 have common factors of 1, 2, 7, and 14.
It is: 80
The GCF is 5.
40
The GCF is 4.
4
140