What is the Greatest Common Factor of 974 and 990?

Greatest common factor (GCF) of 974 and 990 is 2.

GCF(974,990) = 2

We will now calculate the prime factors of 974 and 990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 974 and 990.

How to find the GCF of 974 and 990?

We will first find the prime factorization of 974 and 990. After we will calculate the factors of 974 and 990 and find the biggest common factor number .

Step-1: Prime Factorization of 974

Prime factors of 974 are 2, 487. Prime factorization of 974 in exponential form is:

974 = 2¹ × 487¹

Step-2: Prime Factorization of 990

Prime factors of 990 are 2, 3, 5, 11. Prime factorization of 990 in exponential form is:

990 = 2¹ × 3² × 5¹ × 11¹

Step-3: Factors of 974

List of positive integer factors of 974 that divides 974 without a remainder.

1, 2, 487

Step-4: Factors of 990

List of positive integer factors of 990 that divides 974 without a remainder.

1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 974 and 990. The biggest common factor number is the GCF number.
So the greatest common factor 974 and 990 is 2.

Also check out the Least Common Multiple of 974 and 990