What is the Greatest Common Factor of 81630 and 81645?

Greatest common factor (GCF) of 81630 and 81645 is 15.

GCF(81630,81645) = 15

We will now calculate the prime factors of 81630 and 81645, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81630 and 81645.

How to find the GCF of 81630 and 81645?

We will first find the prime factorization of 81630 and 81645. After we will calculate the factors of 81630 and 81645 and find the biggest common factor number .

Step-1: Prime Factorization of 81630

Prime factors of 81630 are 2, 3, 5, 907. Prime factorization of 81630 in exponential form is:

81630 = 2¹ × 3² × 5¹ × 907¹

Step-2: Prime Factorization of 81645

Prime factors of 81645 are 3, 5, 5443. Prime factorization of 81645 in exponential form is:

81645 = 3¹ × 5¹ × 5443¹

Step-3: Factors of 81630

List of positive integer factors of 81630 that divides 81630 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 907, 1814, 2721, 4535, 5442, 8163, 9070, 13605, 16326, 27210, 40815

Step-4: Factors of 81645

List of positive integer factors of 81645 that divides 81630 without a remainder.

1, 3, 5, 15, 5443, 16329, 27215

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81630 and 81645. The biggest common factor number is the GCF number.
So the greatest common factor 81630 and 81645 is 15.

Also check out the Least Common Multiple of 81630 and 81645