What is the Greatest Common Factor of 990 and 1010?

Greatest common factor (GCF) of 990 and 1010 is 10.

GCF(990,1010) = 10

We will now calculate the prime factors of 990 and 1010, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 990 and 1010.

How to find the GCF of 990 and 1010?

We will first find the prime factorization of 990 and 1010. After we will calculate the factors of 990 and 1010 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 1010

Prime factors of 1010 are 2, 5, 101. Prime factorization of 1010 in exponential form is:

1010 = 2¹ × 5¹ × 101¹

Step-3: Factors of 990

List of positive integer factors of 990 that divides 990 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

Step-4: Factors of 1010

List of positive integer factors of 1010 that divides 990 without a remainder.

1, 2, 5, 10, 101, 202, 505

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 990 and 1010. The biggest common factor number is the GCF number.
So the greatest common factor 990 and 1010 is 10.

Also check out the Least Common Multiple of 990 and 1010