What is the Greatest Common Factor of 21581 and 21588?

Greatest common factor (GCF) of 21581 and 21588 is 7.

GCF(21581,21588) = 7

We will now calculate the prime factors of 21581 and 21588, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21581 and 21588.

How to find the GCF of 21581 and 21588?

We will first find the prime factorization of 21581 and 21588. After we will calculate the factors of 21581 and 21588 and find the biggest common factor number .

Step-1: Prime Factorization of 21581

Prime factors of 21581 are 7, 3083. Prime factorization of 21581 in exponential form is:

21581 = 7¹ × 3083¹

Step-2: Prime Factorization of 21588

Prime factors of 21588 are 2, 3, 7, 257. Prime factorization of 21588 in exponential form is:

21588 = 2² × 3¹ × 7¹ × 257¹

Step-3: Factors of 21581

List of positive integer factors of 21581 that divides 21581 without a remainder.

1, 7, 3083

Step-4: Factors of 21588

List of positive integer factors of 21588 that divides 21581 without a remainder.

1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 257, 514, 771, 1028, 1542, 1799, 3084, 3598, 5397, 7196, 10794

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21581 and 21588. The biggest common factor number is the GCF number.
So the greatest common factor 21581 and 21588 is 7.

Also check out the Least Common Multiple of 21581 and 21588