What is the Greatest Common Factor of 78740 and 78745?

Greatest common factor (GCF) of 78740 and 78745 is 5.

GCF(78740,78745) = 5

We will now calculate the prime factors of 78740 and 78745, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78740 and 78745.

How to find the GCF of 78740 and 78745?

We will first find the prime factorization of 78740 and 78745. After we will calculate the factors of 78740 and 78745 and find the biggest common factor number .

Step-1: Prime Factorization of 78740

Prime factors of 78740 are 2, 5, 31, 127. Prime factorization of 78740 in exponential form is:

78740 = 2² × 5¹ × 31¹ × 127¹

Step-2: Prime Factorization of 78745

Prime factors of 78745 are 5, 15749. Prime factorization of 78745 in exponential form is:

78745 = 5¹ × 15749¹

Step-3: Factors of 78740

List of positive integer factors of 78740 that divides 78740 without a remainder.

1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 254, 310, 508, 620, 635, 1270, 2540, 3937, 7874, 15748, 19685, 39370

Step-4: Factors of 78745

List of positive integer factors of 78745 that divides 78740 without a remainder.

1, 5, 15749

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78740 and 78745. The biggest common factor number is the GCF number.
So the greatest common factor 78740 and 78745 is 5.

Also check out the Least Common Multiple of 78740 and 78745