What is the Greatest Common Factor of 369 and 387?

Greatest common factor (GCF) of 369 and 387 is 9.

GCF(369,387) = 9

We will now calculate the prime factors of 369 and 387, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 369 and 387.

How to find the GCF of 369 and 387?

We will first find the prime factorization of 369 and 387. After we will calculate the factors of 369 and 387 and find the biggest common factor number .

Step-1: Prime Factorization of 369

Prime factors of 369 are 3, 41. Prime factorization of 369 in exponential form is:

369 = 3² × 41¹

Step-2: Prime Factorization of 387

Prime factors of 387 are 3, 43. Prime factorization of 387 in exponential form is:

387 = 3² × 43¹

Step-3: Factors of 369

List of positive integer factors of 369 that divides 369 without a remainder.

1, 3, 9, 41, 123

Step-4: Factors of 387

List of positive integer factors of 387 that divides 369 without a remainder.

1, 3, 9, 43, 129

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 369 and 387. The biggest common factor number is the GCF number.
So the greatest common factor 369 and 387 is 9.

Also check out the Least Common Multiple of 369 and 387