What is the Greatest Common Factor of 19521 and 19539?

Greatest common factor (GCF) of 19521 and 19539 is 9.

GCF(19521,19539) = 9

We will now calculate the prime factors of 19521 and 19539, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19521 and 19539.

How to find the GCF of 19521 and 19539?

We will first find the prime factorization of 19521 and 19539. After we will calculate the factors of 19521 and 19539 and find the biggest common factor number .

Step-1: Prime Factorization of 19521

Prime factors of 19521 are 3, 241. Prime factorization of 19521 in exponential form is:

19521 = 3⁴ × 241¹

Step-2: Prime Factorization of 19539

Prime factors of 19539 are 3, 13, 167. Prime factorization of 19539 in exponential form is:

19539 = 3² × 13¹ × 167¹

Step-3: Factors of 19521

List of positive integer factors of 19521 that divides 19521 without a remainder.

1, 3, 9, 27, 81, 241, 723, 2169, 6507

Step-4: Factors of 19539

List of positive integer factors of 19539 that divides 19521 without a remainder.

1, 3, 9, 13, 39, 117, 167, 501, 1503, 2171, 6513

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19521 and 19539. The biggest common factor number is the GCF number.
So the greatest common factor 19521 and 19539 is 9.

Also check out the Least Common Multiple of 19521 and 19539