Just 1. The numbers are "relatively prime" with no common prime factors.
36 = 2 x 2 x 3 x 3
125 = 5 x 5 x 5
Since 36 is a factor of 1440, all of the factors of 36 will be factors of 1440.
Just 1.
The common factors of 18 and 36 are 18,9,6,3,2,1.
The common factors of 27 and 36 are 1, 3 and 9.
The common factors of 36 and 40 are 1,2 and 4.
Since 12 is a factor of 36, all of the factors of 12 are common to 36.
The common factors of 21 and 36 are 1 and 3
There is no greatest common factor because there are no common factors between the numbers.
4500
The common factors of 36 and 63 are 1, 3 and 9
The common factors of 36 and 81 are: 1, 3, and 9
The common factors of 36 and 80 are: 1, 2, and 4