Question: what is the greatest common factor gcf of 8 and 19?
Answer: Greatest Common Factor of 8 and 19. Greatest common factor (GCF) of 8 and 19 is 1. We will now calculate the prime factors of 8 and 19, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 8 and 19.