What is the Greatest Common Factor of 19191 and 19209?

Greatest common factor (GCF) of 19191 and 19209 is 3.

GCF(19191,19209) = 3

We will now calculate the prime factors of 19191 and 19209, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19191 and 19209.

How to find the GCF of 19191 and 19209?

We will first find the prime factorization of 19191 and 19209. After we will calculate the factors of 19191 and 19209 and find the biggest common factor number .

Step-1: Prime Factorization of 19191

Prime factors of 19191 are 3, 6397. Prime factorization of 19191 in exponential form is:

19191 = 3¹ × 6397¹

Step-2: Prime Factorization of 19209

Prime factors of 19209 are 3, 19, 337. Prime factorization of 19209 in exponential form is:

19209 = 3¹ × 19¹ × 337¹

Step-3: Factors of 19191

List of positive integer factors of 19191 that divides 19191 without a remainder.

1, 3, 6397

Step-4: Factors of 19209

List of positive integer factors of 19209 that divides 19191 without a remainder.

1, 3, 19, 57, 337, 1011, 6403

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19191 and 19209. The biggest common factor number is the GCF number.
So the greatest common factor 19191 and 19209 is 3.

Also check out the Least Common Multiple of 19191 and 19209