What is the Greatest Common Factor of 19683 and 19689?

Greatest common factor (GCF) of 19683 and 19689 is 3.

GCF(19683,19689) = 3

We will now calculate the prime factors of 19683 and 19689, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19683 and 19689.

How to find the GCF of 19683 and 19689?

We will first find the prime factorization of 19683 and 19689. After we will calculate the factors of 19683 and 19689 and find the biggest common factor number .

Step-1: Prime Factorization of 19683

Prime factors of 19683 are 3. Prime factorization of 19683 in exponential form is:

19683 = 3⁹

Step-2: Prime Factorization of 19689

Prime factors of 19689 are 3, 6563. Prime factorization of 19689 in exponential form is:

19689 = 3¹ × 6563¹

Step-3: Factors of 19683

List of positive integer factors of 19683 that divides 19683 without a remainder.

1, 3, 9, 27, 81, 243, 729, 2187, 6561

Step-4: Factors of 19689

List of positive integer factors of 19689 that divides 19683 without a remainder.

1, 3, 6563

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19683 and 19689. The biggest common factor number is the GCF number.
So the greatest common factor 19683 and 19689 is 3.

Also check out the Least Common Multiple of 19683 and 19689