0
Anonymous
The only common factor of 4 and 5 is 1. 4 and 5 are common factors of 20 and 40.
Wiki User
1,2,4
4
The greatest common factor (GCF) is 2.
20, among others.
20 and 40.
12
The GCF is: 1
20
240
Any multiple of 12.
The GCF is 2.
28