What is the Greatest Common Factor of 7812 and 7821?

Greatest common factor (GCF) of 7812 and 7821 is 9.

GCF(7812,7821) = 9

We will now calculate the prime factors of 7812 and 7821, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7812 and 7821.

How to find the GCF of 7812 and 7821?

We will first find the prime factorization of 7812 and 7821. After we will calculate the factors of 7812 and 7821 and find the biggest common factor number .

Step-1: Prime Factorization of 7812

Prime factors of 7812 are 2, 3, 7, 31. Prime factorization of 7812 in exponential form is:

7812 = 2² × 3² × 7¹ × 31¹

Step-2: Prime Factorization of 7821

Prime factors of 7821 are 3, 11, 79. Prime factorization of 7821 in exponential form is:

7821 = 3² × 11¹ × 79¹

Step-3: Factors of 7812

List of positive integer factors of 7812 that divides 7812 without a remainder.

1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 31, 36, 42, 62, 63, 84, 93, 124, 126, 186, 217, 252, 279, 372, 434, 558, 651, 868, 1116, 1302, 1953, 2604, 3906

Step-4: Factors of 7821

List of positive integer factors of 7821 that divides 7812 without a remainder.

1, 3, 9, 11, 33, 79, 99, 237, 711, 869, 2607

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7812 and 7821. The biggest common factor number is the GCF number.
So the greatest common factor 7812 and 7821 is 9.

Also check out the Least Common Multiple of 7812 and 7821