What is the Greatest Common Factor of 20668 and 20672?

Greatest common factor (GCF) of 20668 and 20672 is 4.

GCF(20668,20672) = 4

We will now calculate the prime factors of 20668 and 20672, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20668 and 20672.

How to find the GCF of 20668 and 20672?

We will first find the prime factorization of 20668 and 20672. After we will calculate the factors of 20668 and 20672 and find the biggest common factor number .

Step-1: Prime Factorization of 20668

Prime factors of 20668 are 2, 5167. Prime factorization of 20668 in exponential form is:

20668 = 2² × 5167¹

Step-2: Prime Factorization of 20672

Prime factors of 20672 are 2, 17, 19. Prime factorization of 20672 in exponential form is:

20672 = 2⁶ × 17¹ × 19¹

Step-3: Factors of 20668

List of positive integer factors of 20668 that divides 20668 without a remainder.

1, 2, 4, 5167, 10334

Step-4: Factors of 20672

List of positive integer factors of 20672 that divides 20668 without a remainder.

1, 2, 4, 8, 16, 17, 19, 32, 34, 38, 64, 68, 76, 136, 152, 272, 304, 323, 544, 608, 646, 1088, 1216, 1292, 2584, 5168, 10336

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20668 and 20672. The biggest common factor number is the GCF number.
So the greatest common factor 20668 and 20672 is 4.

Also check out the Least Common Multiple of 20668 and 20672