What is the Greatest Common Factor of 85390 and 85405?

Greatest common factor (GCF) of 85390 and 85405 is 5.

GCF(85390,85405) = 5

We will now calculate the prime factors of 85390 and 85405, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 85390 and 85405.

How to find the GCF of 85390 and 85405?

We will first find the prime factorization of 85390 and 85405. After we will calculate the factors of 85390 and 85405 and find the biggest common factor number .

Step-1: Prime Factorization of 85390

Prime factors of 85390 are 2, 5, 8539. Prime factorization of 85390 in exponential form is:

85390 = 2¹ × 5¹ × 8539¹

Step-2: Prime Factorization of 85405

Prime factors of 85405 are 5, 19, 29, 31. Prime factorization of 85405 in exponential form is:

85405 = 5¹ × 19¹ × 29¹ × 31¹

Step-3: Factors of 85390

List of positive integer factors of 85390 that divides 85390 without a remainder.

1, 2, 5, 10, 8539, 17078, 42695

Step-4: Factors of 85405

List of positive integer factors of 85405 that divides 85390 without a remainder.

1, 5, 19, 29, 31, 95, 145, 155, 551, 589, 899, 2755, 2945, 4495, 17081

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 85390 and 85405. The biggest common factor number is the GCF number.
So the greatest common factor 85390 and 85405 is 5.

Also check out the Least Common Multiple of 85390 and 85405