What is the Greatest Common Factor of 580 and 585?

Greatest common factor (GCF) of 580 and 585 is 5.

GCF(580,585) = 5

We will now calculate the prime factors of 580 and 585, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 580 and 585.

How to find the GCF of 580 and 585?

We will first find the prime factorization of 580 and 585. After we will calculate the factors of 580 and 585 and find the biggest common factor number .

Step-1: Prime Factorization of 580

Prime factors of 580 are 2, 5, 29. Prime factorization of 580 in exponential form is:

580 = 2² × 5¹ × 29¹

Step-2: 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-3: Factors of 580

List of positive integer factors of 580 that divides 580 without a remainder.

1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290

Step-4: Factors of 585

List of positive integer factors of 585 that divides 580 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 580 and 585. The biggest common factor number is the GCF number.
So the greatest common factor 580 and 585 is 5.

Also check out the Least Common Multiple of 580 and 585