What is the Greatest Common Factor of 12805 and 12821?

Greatest common factor (GCF) of 12805 and 12821 is 1.

GCF(12805,12821) = 1

We will now calculate the prime factors of 12805 and 12821, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12805 and 12821.

How to find the GCF of 12805 and 12821?

We will first find the prime factorization of 12805 and 12821. After we will calculate the factors of 12805 and 12821 and find the biggest common factor number .

Step-1: Prime Factorization of 12805

Prime factors of 12805 are 5, 13, 197. Prime factorization of 12805 in exponential form is:

12805 = 5¹ × 13¹ × 197¹

Step-2: Prime Factorization of 12821

Prime factors of 12821 are 12821. Prime factorization of 12821 in exponential form is:

12821 = 12821¹

Step-3: Factors of 12805

List of positive integer factors of 12805 that divides 12805 without a remainder.

1, 5, 13, 65, 197, 985, 2561

Step-4: Factors of 12821

List of positive integer factors of 12821 that divides 12805 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12805 and 12821. The biggest common factor number is the GCF number.
So the greatest common factor 12805 and 12821 is 1.

Also check out the Least Common Multiple of 12805 and 12821