What is the Greatest Common Factor of 78045 and 78065?

Greatest common factor (GCF) of 78045 and 78065 is 5.

GCF(78045,78065) = 5

We will now calculate the prime factors of 78045 and 78065, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78045 and 78065.

How to find the GCF of 78045 and 78065?

We will first find the prime factorization of 78045 and 78065. After we will calculate the factors of 78045 and 78065 and find the biggest common factor number .

Step-1: Prime Factorization of 78045

Prime factors of 78045 are 3, 5, 11, 43. Prime factorization of 78045 in exponential form is:

78045 = 3¹ × 5¹ × 11² × 43¹

Step-2: Prime Factorization of 78065

Prime factors of 78065 are 5, 13, 1201. Prime factorization of 78065 in exponential form is:

78065 = 5¹ × 13¹ × 1201¹

Step-3: Factors of 78045

List of positive integer factors of 78045 that divides 78045 without a remainder.

1, 3, 5, 11, 15, 33, 43, 55, 121, 129, 165, 215, 363, 473, 605, 645, 1419, 1815, 2365, 5203, 7095, 15609, 26015

Step-4: Factors of 78065

List of positive integer factors of 78065 that divides 78045 without a remainder.

1, 5, 13, 65, 1201, 6005, 15613

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78045 and 78065. The biggest common factor number is the GCF number.
So the greatest common factor 78045 and 78065 is 5.

Also check out the Least Common Multiple of 78045 and 78065