What is the Greatest Common Factor of 18171 and 18189?

Greatest common factor (GCF) of 18171 and 18189 is 9.

GCF(18171,18189) = 9

We will now calculate the prime factors of 18171 and 18189, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18171 and 18189.

How to find the GCF of 18171 and 18189?

We will first find the prime factorization of 18171 and 18189. After we will calculate the factors of 18171 and 18189 and find the biggest common factor number .

Step-1: Prime Factorization of 18171

Prime factors of 18171 are 3, 673. Prime factorization of 18171 in exponential form is:

18171 = 3³ × 673¹

Step-2: Prime Factorization of 18189

Prime factors of 18189 are 3, 43, 47. Prime factorization of 18189 in exponential form is:

18189 = 3² × 43¹ × 47¹

Step-3: Factors of 18171

List of positive integer factors of 18171 that divides 18171 without a remainder.

1, 3, 9, 27, 673, 2019, 6057

Step-4: Factors of 18189

List of positive integer factors of 18189 that divides 18171 without a remainder.

1, 3, 9, 43, 47, 129, 141, 387, 423, 2021, 6063

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18171 and 18189. The biggest common factor number is the GCF number.
So the greatest common factor 18171 and 18189 is 9.

Also check out the Least Common Multiple of 18171 and 18189