What is the Greatest Common Factor of 21820 and 21837?

Greatest common factor (GCF) of 21820 and 21837 is 1.

GCF(21820,21837) = 1

We will now calculate the prime factors of 21820 and 21837, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21820 and 21837.

How to find the GCF of 21820 and 21837?

We will first find the prime factorization of 21820 and 21837. After we will calculate the factors of 21820 and 21837 and find the biggest common factor number .

Step-1: Prime Factorization of 21820

Prime factors of 21820 are 2, 5, 1091. Prime factorization of 21820 in exponential form is:

21820 = 2² × 5¹ × 1091¹

Step-2: Prime Factorization of 21837

Prime factors of 21837 are 3, 29, 251. Prime factorization of 21837 in exponential form is:

21837 = 3¹ × 29¹ × 251¹

Step-3: Factors of 21820

List of positive integer factors of 21820 that divides 21820 without a remainder.

1, 2, 4, 5, 10, 20, 1091, 2182, 4364, 5455, 10910

Step-4: Factors of 21837

List of positive integer factors of 21837 that divides 21820 without a remainder.

1, 3, 29, 87, 251, 753, 7279

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21820 and 21837. The biggest common factor number is the GCF number.
So the greatest common factor 21820 and 21837 is 1.

Also check out the Least Common Multiple of 21820 and 21837