What is the Greatest Common Factor of 370 and 387?

Greatest common factor (GCF) of 370 and 387 is 1.

GCF(370,387) = 1

We will now calculate the prime factors of 370 and 387, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 370 and 387.

How to find the GCF of 370 and 387?

We will first find the prime factorization of 370 and 387. After we will calculate the factors of 370 and 387 and find the biggest common factor number .

Step-1: Prime Factorization of 370

Prime factors of 370 are 2, 5, 37. Prime factorization of 370 in exponential form is:

370 = 2¹ × 5¹ × 37¹

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 370

List of positive integer factors of 370 that divides 370 without a remainder.

1, 2, 5, 10, 37, 74, 185

Step-4: Factors of 387

List of positive integer factors of 387 that divides 370 without a remainder.

1, 3, 9, 43, 129

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 370 and 387. The biggest common factor number is the GCF number.
So the greatest common factor 370 and 387 is 1.

Also check out the Least Common Multiple of 370 and 387