What is the Greatest Common Factor of 20605 and 20615?

Greatest common factor (GCF) of 20605 and 20615 is 5.

GCF(20605,20615) = 5

We will now calculate the prime factors of 20605 and 20615, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20605 and 20615.

How to find the GCF of 20605 and 20615?

We will first find the prime factorization of 20605 and 20615. After we will calculate the factors of 20605 and 20615 and find the biggest common factor number .

Step-1: Prime Factorization of 20605

Prime factors of 20605 are 5, 13, 317. Prime factorization of 20605 in exponential form is:

20605 = 5¹ × 13¹ × 317¹

Step-2: Prime Factorization of 20615

Prime factors of 20615 are 5, 7, 19, 31. Prime factorization of 20615 in exponential form is:

20615 = 5¹ × 7¹ × 19¹ × 31¹

Step-3: Factors of 20605

List of positive integer factors of 20605 that divides 20605 without a remainder.

1, 5, 13, 65, 317, 1585, 4121

Step-4: Factors of 20615

List of positive integer factors of 20615 that divides 20605 without a remainder.

1, 5, 7, 19, 31, 35, 95, 133, 155, 217, 589, 665, 1085, 2945, 4123

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20605 and 20615. The biggest common factor number is the GCF number.
So the greatest common factor 20605 and 20615 is 5.

Also check out the Least Common Multiple of 20605 and 20615