What is the Greatest Common Factor of 585 and 605?

Greatest common factor (GCF) of 585 and 605 is 5.

GCF(585,605) = 5

We will now calculate the prime factors of 585 and 605, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 585 and 605.

How to find the GCF of 585 and 605?

We will first find the prime factorization of 585 and 605. After we will calculate the factors of 585 and 605 and find the biggest common factor number .

Step-1: Prime Factorization of 585

Prime factors of 585 are 3, 5, 13. Prime factorization of 585 in exponential form is:

585 = 3² × 5¹ × 13¹

Step-2: Prime Factorization of 605

Prime factors of 605 are 5, 11. Prime factorization of 605 in exponential form is:

605 = 5¹ × 11²

Step-3: Factors of 585

List of positive integer factors of 585 that divides 585 without a remainder.

1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195

Step-4: Factors of 605

List of positive integer factors of 605 that divides 585 without a remainder.

1, 5, 11, 55, 121

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 585 and 605. The biggest common factor number is the GCF number.
So the greatest common factor 585 and 605 is 5.

Also check out the Least Common Multiple of 585 and 605