What is the Greatest Common Factor of 81306 and 81315?

Greatest common factor (GCF) of 81306 and 81315 is 9.

GCF(81306,81315) = 9

We will now calculate the prime factors of 81306 and 81315, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81306 and 81315.

How to find the GCF of 81306 and 81315?

We will first find the prime factorization of 81306 and 81315. After we will calculate the factors of 81306 and 81315 and find the biggest common factor number .

Step-1: Prime Factorization of 81306

Prime factors of 81306 are 2, 3, 4517. Prime factorization of 81306 in exponential form is:

81306 = 2¹ × 3² × 4517¹

Step-2: Prime Factorization of 81315

Prime factors of 81315 are 3, 5, 13, 139. Prime factorization of 81315 in exponential form is:

81315 = 3² × 5¹ × 13¹ × 139¹

Step-3: Factors of 81306

List of positive integer factors of 81306 that divides 81306 without a remainder.

1, 2, 3, 6, 9, 18, 4517, 9034, 13551, 27102, 40653

Step-4: Factors of 81315

List of positive integer factors of 81315 that divides 81306 without a remainder.

1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 139, 195, 417, 585, 695, 1251, 1807, 2085, 5421, 6255, 9035, 16263, 27105

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81306 and 81315. The biggest common factor number is the GCF number.
So the greatest common factor 81306 and 81315 is 9.

Also check out the Least Common Multiple of 81306 and 81315