39 has a couple factors: 1, 3, 13, 39. Its greatest factor would be 39. HOWEVER, it doesn't have a common factor. You need two numbers to find what their greatest common factor is.
For instance: 8 and 12. 8 has 1,2,4,8 and 12 has 1,2,3,4,6,12. The factors they have in common are 2 and 4, with 4 being their GCF.
So 39 cannot have a common factor unless there is another number!
The Greatest Common Factor (GCF) is: 1
The Greatest Common Factor (GCF) is: 13
The greatest or highest common factor is the highest number that divides exactly into two or more numbers. 39: 1, 3, 13, 39 87: 1, 3, 29, 87 The greatest common factor for 39 and 87 is 3.
1
Three.
It is 3
1
Since 13 is a factor of 39, it is automatically the GCF of this problem.
39 and 93's highest common factor is three.
39 and 45's highest common factor is three.
It is: 13
It is 13