What is the Greatest Common Factor of 81309 and 81318?

Greatest common factor (GCF) of 81309 and 81318 is 3.

GCF(81309,81318) = 3

We will now calculate the prime factors of 81309 and 81318, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81309 and 81318.

How to find the GCF of 81309 and 81318?

We will first find the prime factorization of 81309 and 81318. After we will calculate the factors of 81309 and 81318 and find the biggest common factor number .

Step-1: Prime Factorization of 81309

Prime factors of 81309 are 3, 27103. Prime factorization of 81309 in exponential form is:

81309 = 3¹ × 27103¹

Step-2: Prime Factorization of 81318

Prime factors of 81318 are 2, 3, 13553. Prime factorization of 81318 in exponential form is:

81318 = 2¹ × 3¹ × 13553¹

Step-3: Factors of 81309

List of positive integer factors of 81309 that divides 81309 without a remainder.

1, 3, 27103

Step-4: Factors of 81318

List of positive integer factors of 81318 that divides 81309 without a remainder.

1, 2, 3, 6, 13553, 27106, 40659

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81309 and 81318. The biggest common factor number is the GCF number.
So the greatest common factor 81309 and 81318 is 3.

Also check out the Least Common Multiple of 81309 and 81318