What is the Greatest Common Factor of 806 and 810?

Greatest common factor (GCF) of 806 and 810 is 2.

GCF(806,810) = 2

We will now calculate the prime factors of 806 and 810, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 806 and 810.

How to find the GCF of 806 and 810?

We will first find the prime factorization of 806 and 810. After we will calculate the factors of 806 and 810 and find the biggest common factor number .

Step-1: Prime Factorization of 806

Prime factors of 806 are 2, 13, 31. Prime factorization of 806 in exponential form is:

806 = 2¹ × 13¹ × 31¹

Step-2: Prime Factorization of 810

Prime factors of 810 are 2, 3, 5. Prime factorization of 810 in exponential form is:

810 = 2¹ × 3⁴ × 5¹

Step-3: Factors of 806

List of positive integer factors of 806 that divides 806 without a remainder.

1, 2, 13, 26, 31, 62, 403

Step-4: Factors of 810

List of positive integer factors of 810 that divides 806 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 806 and 810. The biggest common factor number is the GCF number.
So the greatest common factor 806 and 810 is 2.

Also check out the Least Common Multiple of 806 and 810