What is the Greatest Common Factor of 7938 and 7947?

Greatest common factor (GCF) of 7938 and 7947 is 9.

GCF(7938,7947) = 9

We will now calculate the prime factors of 7938 and 7947, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7938 and 7947.

How to find the GCF of 7938 and 7947?

We will first find the prime factorization of 7938 and 7947. After we will calculate the factors of 7938 and 7947 and find the biggest common factor number .

Step-1: Prime Factorization of 7938

Prime factors of 7938 are 2, 3, 7. Prime factorization of 7938 in exponential form is:

7938 = 2¹ × 3⁴ × 7²

Step-2: Prime Factorization of 7947

Prime factors of 7947 are 3, 883. Prime factorization of 7947 in exponential form is:

7947 = 3² × 883¹

Step-3: Factors of 7938

List of positive integer factors of 7938 that divides 7938 without a remainder.

1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 49, 54, 63, 81, 98, 126, 147, 162, 189, 294, 378, 441, 567, 882, 1134, 1323, 2646, 3969

Step-4: Factors of 7947

List of positive integer factors of 7947 that divides 7938 without a remainder.

1, 3, 9, 883, 2649

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7938 and 7947. The biggest common factor number is the GCF number.
So the greatest common factor 7938 and 7947 is 9.

Also check out the Least Common Multiple of 7938 and 7947