What is the Greatest Common Factor of 21261 and 21276?

Greatest common factor (GCF) of 21261 and 21276 is 3.

GCF(21261,21276) = 3

We will now calculate the prime factors of 21261 and 21276, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21261 and 21276.

How to find the GCF of 21261 and 21276?

We will first find the prime factorization of 21261 and 21276. After we will calculate the factors of 21261 and 21276 and find the biggest common factor number .

Step-1: Prime Factorization of 21261

Prime factors of 21261 are 3, 19, 373. Prime factorization of 21261 in exponential form is:

21261 = 3¹ × 19¹ × 373¹

Step-2: Prime Factorization of 21276

Prime factors of 21276 are 2, 3, 197. Prime factorization of 21276 in exponential form is:

21276 = 2² × 3³ × 197¹

Step-3: Factors of 21261

List of positive integer factors of 21261 that divides 21261 without a remainder.

1, 3, 19, 57, 373, 1119, 7087

Step-4: Factors of 21276

List of positive integer factors of 21276 that divides 21261 without a remainder.

1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108, 197, 394, 591, 788, 1182, 1773, 2364, 3546, 5319, 7092, 10638

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21261 and 21276. The biggest common factor number is the GCF number.
So the greatest common factor 21261 and 21276 is 3.

Also check out the Least Common Multiple of 21261 and 21276