What is the Greatest Common Factor of 21753 and 21768?

Greatest common factor (GCF) of 21753 and 21768 is 3.

GCF(21753,21768) = 3

We will now calculate the prime factors of 21753 and 21768, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21753 and 21768.

How to find the GCF of 21753 and 21768?

We will first find the prime factorization of 21753 and 21768. After we will calculate the factors of 21753 and 21768 and find the biggest common factor number .

Step-1: Prime Factorization of 21753

Prime factors of 21753 are 3, 2417. Prime factorization of 21753 in exponential form is:

21753 = 3² × 2417¹

Step-2: Prime Factorization of 21768

Prime factors of 21768 are 2, 3, 907. Prime factorization of 21768 in exponential form is:

21768 = 2³ × 3¹ × 907¹

Step-3: Factors of 21753

List of positive integer factors of 21753 that divides 21753 without a remainder.

1, 3, 9, 2417, 7251

Step-4: Factors of 21768

List of positive integer factors of 21768 that divides 21753 without a remainder.

1, 2, 3, 4, 6, 8, 12, 24, 907, 1814, 2721, 3628, 5442, 7256, 10884

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21753 and 21768. The biggest common factor number is the GCF number.
So the greatest common factor 21753 and 21768 is 3.

Also check out the Least Common Multiple of 21753 and 21768