What is the Greatest Common Factor of 7581 and 7590?

Greatest common factor (GCF) of 7581 and 7590 is 3.

GCF(7581,7590) = 3

We will now calculate the prime factors of 7581 and 7590, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7581 and 7590.

How to find the GCF of 7581 and 7590?

We will first find the prime factorization of 7581 and 7590. After we will calculate the factors of 7581 and 7590 and find the biggest common factor number .

Step-1: Prime Factorization of 7581

Prime factors of 7581 are 3, 7, 19. Prime factorization of 7581 in exponential form is:

7581 = 3¹ × 7¹ × 19²

Step-2: Prime Factorization of 7590

Prime factors of 7590 are 2, 3, 5, 11, 23. Prime factorization of 7590 in exponential form is:

7590 = 2¹ × 3¹ × 5¹ × 11¹ × 23¹

Step-3: Factors of 7581

List of positive integer factors of 7581 that divides 7581 without a remainder.

1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527

Step-4: Factors of 7590

List of positive integer factors of 7590 that divides 7581 without a remainder.

1, 2, 3, 5, 6, 10, 11, 15, 22, 23, 30, 33, 46, 55, 66, 69, 110, 115, 138, 165, 230, 253, 330, 345, 506, 690, 759, 1265, 1518, 2530, 3795

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7581 and 7590. The biggest common factor number is the GCF number.
So the greatest common factor 7581 and 7590 is 3.

Also check out the Least Common Multiple of 7581 and 7590