What is the Greatest Common Factor of 90972 and 90990?

Greatest common factor (GCF) of 90972 and 90990 is 18.

GCF(90972,90990) = 18

We will now calculate the prime factors of 90972 and 90990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 90972 and 90990.

How to find the GCF of 90972 and 90990?

We will first find the prime factorization of 90972 and 90990. After we will calculate the factors of 90972 and 90990 and find the biggest common factor number .

Step-1: Prime Factorization of 90972

Prime factors of 90972 are 2, 3, 7, 19. Prime factorization of 90972 in exponential form is:

90972 = 2² × 3² × 7¹ × 19²

Step-2: Prime Factorization of 90990

Prime factors of 90990 are 2, 3, 5, 337. Prime factorization of 90990 in exponential form is:

90990 = 2¹ × 3³ × 5¹ × 337¹

Step-3: Factors of 90972

List of positive integer factors of 90972 that divides 90972 without a remainder.

1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 19, 21, 28, 36, 38, 42, 57, 63, 76, 84, 114, 126, 133, 171, 228, 252, 266, 342, 361, 399, 532, 684, 722, 798, 1083, 1197, 1444, 1596, 2166, 2394, 2527, 3249, 4332, 4788, 5054, 6498, 7581, 10108, 12996, 15162, 22743, 30324, 45486

Step-4: Factors of 90990

List of positive integer factors of 90990 that divides 90972 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 270, 337, 674, 1011, 1685, 2022, 3033, 3370, 5055, 6066, 9099, 10110, 15165, 18198, 30330, 45495

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 90972 and 90990. The biggest common factor number is the GCF number.
So the greatest common factor 90972 and 90990 is 18.

Also check out the Least Common Multiple of 90972 and 90990