What is the Greatest Common Factor of 20809 and 20815?

Greatest common factor (GCF) of 20809 and 20815 is 1.

GCF(20809,20815) = 1

We will now calculate the prime factors of 20809 and 20815, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20809 and 20815.

How to find the GCF of 20809 and 20815?

We will first find the prime factorization of 20809 and 20815. After we will calculate the factors of 20809 and 20815 and find the biggest common factor number .

Step-1: Prime Factorization of 20809

Prime factors of 20809 are 20809. Prime factorization of 20809 in exponential form is:

20809 = 20809¹

Step-2: Prime Factorization of 20815

Prime factors of 20815 are 5, 23, 181. Prime factorization of 20815 in exponential form is:

20815 = 5¹ × 23¹ × 181¹

Step-3: Factors of 20809

List of positive integer factors of 20809 that divides 20809 without a remainder.

Step-4: Factors of 20815

List of positive integer factors of 20815 that divides 20809 without a remainder.

1, 5, 23, 115, 181, 905, 4163

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20809 and 20815. The biggest common factor number is the GCF number.
So the greatest common factor 20809 and 20815 is 1.

Also check out the Least Common Multiple of 20809 and 20815