What is the Greatest Common Factor of 1521 and 1531?

Greatest common factor (GCF) of 1521 and 1531 is 1.

GCF(1521,1531) = 1

We will now calculate the prime factors of 1521 and 1531, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1521 and 1531.

How to find the GCF of 1521 and 1531?

We will first find the prime factorization of 1521 and 1531. After we will calculate the factors of 1521 and 1531 and find the biggest common factor number .

Step-1: Prime Factorization of 1521

Prime factors of 1521 are 3, 13. Prime factorization of 1521 in exponential form is:

1521 = 3² × 13²

Step-2: Prime Factorization of 1531

Prime factors of 1531 are 1531. Prime factorization of 1531 in exponential form is:

1531 = 1531¹

Step-3: Factors of 1521

List of positive integer factors of 1521 that divides 1521 without a remainder.

1, 3, 9, 13, 39, 117, 169, 507

Step-4: Factors of 1531

List of positive integer factors of 1531 that divides 1521 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1521 and 1531. The biggest common factor number is the GCF number.
So the greatest common factor 1521 and 1531 is 1.

Also check out the Least Common Multiple of 1521 and 1531