Question: what is the greatest common factor between 49 and 14?
Answer: The prime factorization of 14 is: 2 x 7. The prime factorization of 49 is: 7 x 7. The prime factors and multiplicities 14 and 49 have in common are: 7. 7 is the gcf of 14 and 49. gcf(14,49) = 7.