What is the Greatest Common Factor of 67770 and 67785?

Greatest common factor (GCF) of 67770 and 67785 is 15.

GCF(67770,67785) = 15

We will now calculate the prime factors of 67770 and 67785, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 67770 and 67785.

How to find the GCF of 67770 and 67785?

We will first find the prime factorization of 67770 and 67785. After we will calculate the factors of 67770 and 67785 and find the biggest common factor number .

Step-1: Prime Factorization of 67770

Prime factors of 67770 are 2, 3, 5, 251. Prime factorization of 67770 in exponential form is:

67770 = 2¹ × 3³ × 5¹ × 251¹

Step-2: Prime Factorization of 67785

Prime factors of 67785 are 3, 5, 4519. Prime factorization of 67785 in exponential form is:

67785 = 3¹ × 5¹ × 4519¹

Step-3: Factors of 67770

List of positive integer factors of 67770 that divides 67770 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 251, 270, 502, 753, 1255, 1506, 2259, 2510, 3765, 4518, 6777, 7530, 11295, 13554, 22590, 33885

Step-4: Factors of 67785

List of positive integer factors of 67785 that divides 67770 without a remainder.

1, 3, 5, 15, 4519, 13557, 22595

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 67770 and 67785. The biggest common factor number is the GCF number.
So the greatest common factor 67770 and 67785 is 15.

Also check out the Least Common Multiple of 67770 and 67785