What is the Greatest Common Factor of 321 and 330?

Greatest common factor (GCF) of 321 and 330 is 3.

GCF(321,330) = 3

We will now calculate the prime factors of 321 and 330, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 321 and 330.

How to find the GCF of 321 and 330?

We will first find the prime factorization of 321 and 330. After we will calculate the factors of 321 and 330 and find the biggest common factor number .

Step-1: Prime Factorization of 321

Prime factors of 321 are 3, 107. Prime factorization of 321 in exponential form is:

321 = 3¹ × 107¹

Step-2: Prime Factorization of 330

Prime factors of 330 are 2, 3, 5, 11. Prime factorization of 330 in exponential form is:

330 = 2¹ × 3¹ × 5¹ × 11¹

Step-3: Factors of 321

List of positive integer factors of 321 that divides 321 without a remainder.

1, 3, 107

Step-4: Factors of 330

List of positive integer factors of 330 that divides 321 without a remainder.

1, 2, 3, 5, 6, 10, 11, 15, 22, 30, 33, 55, 66, 110, 165

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 321 and 330. The biggest common factor number is the GCF number.
So the greatest common factor 321 and 330 is 3.

Also check out the Least Common Multiple of 321 and 330