Question: what is the greatest common factor between 14 and 45?
Answer: The prime factorization of 14 is: 2 x 7.
The prime factorization of 45 is: 3 x 3 x 5.
The prime factors and multiplicities 14 and 45 have in common are: 1.
1 is the gcf of 14 and 45.
gcf(14,45) = 1.