What is the greatest common factor of 19 and 78?

Answer 1

The greatest common factor (GCF) of two numbers is the largest positive integer that divides both numbers without leaving a remainder. To find the GCF of 19 and 78, you can list the factors of each number: 19 (1, 19) and 78 (1, 2, 3, 6, 13, 26, 39, 78). The only common factor between 19 and 78 is 1, making the GCF of 19 and 78 equal to 1.

Answer 2

The GCF is 1.

Answer 3

GCF(19, 78) = 1.