What is the Greatest Common Factor of 21330 and 21339?

Greatest common factor (GCF) of 21330 and 21339 is 9.

GCF(21330,21339) = 9

We will now calculate the prime factors of 21330 and 21339, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21330 and 21339.

How to find the GCF of 21330 and 21339?

We will first find the prime factorization of 21330 and 21339. After we will calculate the factors of 21330 and 21339 and find the biggest common factor number .

Step-1: Prime Factorization of 21330

Prime factors of 21330 are 2, 3, 5, 79. Prime factorization of 21330 in exponential form is:

21330 = 2¹ × 3³ × 5¹ × 79¹

Step-2: Prime Factorization of 21339

Prime factors of 21339 are 3, 2371. Prime factorization of 21339 in exponential form is:

21339 = 3² × 2371¹

Step-3: Factors of 21330

List of positive integer factors of 21330 that divides 21330 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 79, 90, 135, 158, 237, 270, 395, 474, 711, 790, 1185, 1422, 2133, 2370, 3555, 4266, 7110, 10665

Step-4: Factors of 21339

List of positive integer factors of 21339 that divides 21330 without a remainder.

1, 3, 9, 2371, 7113

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21330 and 21339. The biggest common factor number is the GCF number.
So the greatest common factor 21330 and 21339 is 9.

Also check out the Least Common Multiple of 21330 and 21339