What is the Greatest Common Factor of 18189 and 18195?

Greatest common factor (GCF) of 18189 and 18195 is 3.

GCF(18189,18195) = 3

We will now calculate the prime factors of 18189 and 18195, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18189 and 18195.

How to find the GCF of 18189 and 18195?

We will first find the prime factorization of 18189 and 18195. After we will calculate the factors of 18189 and 18195 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 18195

Prime factors of 18195 are 3, 5, 1213. Prime factorization of 18195 in exponential form is:

18195 = 3¹ × 5¹ × 1213¹

Step-3: Factors of 18189

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

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

Step-4: Factors of 18195

List of positive integer factors of 18195 that divides 18189 without a remainder.

1, 3, 5, 15, 1213, 3639, 6065

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18189 and 18195. The biggest common factor number is the GCF number.
So the greatest common factor 18189 and 18195 is 3.

Also check out the Least Common Multiple of 18189 and 18195