What is the Greatest Common Factor of 10809 and 10815?

Greatest common factor (GCF) of 10809 and 10815 is 3.

GCF(10809,10815) = 3

We will now calculate the prime factors of 10809 and 10815, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 10809 and 10815.

How to find the GCF of 10809 and 10815?

We will first find the prime factorization of 10809 and 10815. After we will calculate the factors of 10809 and 10815 and find the biggest common factor number .

Step-1: Prime Factorization of 10809

Prime factors of 10809 are 3, 1201. Prime factorization of 10809 in exponential form is:

10809 = 3² × 1201¹

Step-2: Prime Factorization of 10815

Prime factors of 10815 are 3, 5, 7, 103. Prime factorization of 10815 in exponential form is:

10815 = 3¹ × 5¹ × 7¹ × 103¹

Step-3: Factors of 10809

List of positive integer factors of 10809 that divides 10809 without a remainder.

1, 3, 9, 1201, 3603

Step-4: Factors of 10815

List of positive integer factors of 10815 that divides 10809 without a remainder.

1, 3, 5, 7, 15, 21, 35, 103, 105, 309, 515, 721, 1545, 2163, 3605

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 10809 and 10815. The biggest common factor number is the GCF number.
So the greatest common factor 10809 and 10815 is 3.

Also check out the Least Common Multiple of 10809 and 10815