Question: what is the highest common factor of 19 and 48?
Answer: The prime factorization of 19 is: 19.
The prime factorization of 48 is: 2 x 2 x 2 x 2 x 3.
The prime factors and multiplicities 19 and 48 have in common are: 1.
1 is the gcf of 19 and 48.
gcf(19,48) = 1.