What is the Greatest Common Factor of 78270 and 78285?

Greatest common factor (GCF) of 78270 and 78285 is 15.

GCF(78270,78285) = 15

We will now calculate the prime factors of 78270 and 78285, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78270 and 78285.

How to find the GCF of 78270 and 78285?

We will first find the prime factorization of 78270 and 78285. After we will calculate the factors of 78270 and 78285 and find the biggest common factor number .

Step-1: Prime Factorization of 78270

Prime factors of 78270 are 2, 3, 5, 2609. Prime factorization of 78270 in exponential form is:

78270 = 2¹ × 3¹ × 5¹ × 2609¹

Step-2: Prime Factorization of 78285

Prime factors of 78285 are 3, 5, 17, 307. Prime factorization of 78285 in exponential form is:

78285 = 3¹ × 5¹ × 17¹ × 307¹

Step-3: Factors of 78270

List of positive integer factors of 78270 that divides 78270 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 2609, 5218, 7827, 13045, 15654, 26090, 39135

Step-4: Factors of 78285

List of positive integer factors of 78285 that divides 78270 without a remainder.

1, 3, 5, 15, 17, 51, 85, 255, 307, 921, 1535, 4605, 5219, 15657, 26095

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78270 and 78285. The biggest common factor number is the GCF number.
So the greatest common factor 78270 and 78285 is 15.

Also check out the Least Common Multiple of 78270 and 78285