What is the Greatest Common Factor of 7821 and 7836?

Greatest common factor (GCF) of 7821 and 7836 is 3.

GCF(7821,7836) = 3

We will now calculate the prime factors of 7821 and 7836, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7821 and 7836.

How to find the GCF of 7821 and 7836?

We will first find the prime factorization of 7821 and 7836. After we will calculate the factors of 7821 and 7836 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 7836

Prime factors of 7836 are 2, 3, 653. Prime factorization of 7836 in exponential form is:

7836 = 2² × 3¹ × 653¹

Step-3: Factors of 7821

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

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

Step-4: Factors of 7836

List of positive integer factors of 7836 that divides 7821 without a remainder.

1, 2, 3, 4, 6, 12, 653, 1306, 1959, 2612, 3918

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7821 and 7836. The biggest common factor number is the GCF number.
So the greatest common factor 7821 and 7836 is 3.

Also check out the Least Common Multiple of 7821 and 7836