What is the Greatest Common Factor of 78645 and 78665?

Greatest common factor (GCF) of 78645 and 78665 is 5.

GCF(78645,78665) = 5

We will now calculate the prime factors of 78645 and 78665, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78645 and 78665.

How to find the GCF of 78645 and 78665?

We will first find the prime factorization of 78645 and 78665. After we will calculate the factors of 78645 and 78665 and find the biggest common factor number .

Step-1: Prime Factorization of 78645

Prime factors of 78645 are 3, 5, 7, 107. Prime factorization of 78645 in exponential form is:

78645 = 3¹ × 5¹ × 7² × 107¹

Step-2: Prime Factorization of 78665

Prime factors of 78665 are 5, 15733. Prime factorization of 78665 in exponential form is:

78665 = 5¹ × 15733¹

Step-3: Factors of 78645

List of positive integer factors of 78645 that divides 78645 without a remainder.

1, 3, 5, 7, 15, 21, 35, 49, 105, 107, 147, 245, 321, 535, 735, 749, 1605, 2247, 3745, 5243, 11235, 15729, 26215

Step-4: Factors of 78665

List of positive integer factors of 78665 that divides 78645 without a remainder.

1, 5, 15733

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78645 and 78665. The biggest common factor number is the GCF number.
So the greatest common factor 78645 and 78665 is 5.

Also check out the Least Common Multiple of 78645 and 78665