What is the greatest common factor of 38 and 95?

One way to determine the greatest common factor is to find all the factors of the numbers and compare them.
The factors of 38 are 1, 2, 19, and 38.
The factors of 95 are 1, 5, 19, and 95.
The common factors are 1 and 19. Therefore, the greatest common factor is 19.

The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.
The prime factors of 38 are 2 and 19.
The prime factors of 95 are 5 and 19.
The prime factors in common are a single 19, so the greatest common factor is 19. 19. 2 times 19=38 5 times 19=95