![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Method 1:
\List the factors of each number.
\Factors of 16: 2, 4, 8, 16.
\Factors of 56: 2, 4, 7, 8, 14, 28,56.
\Identify the greatest common factor.
\The greatest common factor of 16 and 56 is 8.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Method 2:
\Write the prime factorization of each number.
\16 = 2 × 2 × 2 × 2.
\56 = 2 × 2 × 2 × 7.
\The GCF is the product of the common prime factors in each number.
\GCF = 2 × 2 × 2 = 8.
\The greatest common factor of 16 and 56 is 8.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The greatest common factor of 16 and 56 is 8.