What is the Greatest Common Factor of 810 and 818?

Greatest common factor (GCF) of 810 and 818 is 2.

GCF(810,818) = 2

We will now calculate the prime factors of 810 and 818, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 810 and 818.

How to find the GCF of 810 and 818?

We will first find the prime factorization of 810 and 818. After we will calculate the factors of 810 and 818 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 818

Prime factors of 818 are 2, 409. Prime factorization of 818 in exponential form is:

818 = 2¹ × 409¹

Step-3: Factors of 810

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

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

Step-4: Factors of 818

List of positive integer factors of 818 that divides 810 without a remainder.

1, 2, 409

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 810 and 818. The biggest common factor number is the GCF number.
So the greatest common factor 810 and 818 is 2.

Also check out the Least Common Multiple of 810 and 818