4
1,2,4
The factors of 4 are 1,2, and 4.The factors of 20 are 1,2,4,5,10 and 20.The factors of 24 are 1,2,3,4,6,8,12, and 24.1, 2, and 4 are the only common factors for 4, 20, and 24.
The only common factor of 4 and 5 is 1. 4 and 5 are common factors of 20 and 40.
4
20, among others.
20 and 40.
140
20
Factors of 20:1,2,4,5,10,20Factors of 65:1,5,13,65The common factors are 1 and 5.
The common factors of 18 and 20 are 1 and 2.
The common factors of 20 and 26 are 1 and 2
The common factors of 20 and 22 are 1, 2.