What is the Greatest Common Factor of 1538 and 1557?

Greatest common factor (GCF) of 1538 and 1557 is 1.

GCF(1538,1557) = 1

We will now calculate the prime factors of 1538 and 1557, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1538 and 1557.

How to find the GCF of 1538 and 1557?

We will first find the prime factorization of 1538 and 1557. After we will calculate the factors of 1538 and 1557 and find the biggest common factor number .

Step-1: Prime Factorization of 1538

Prime factors of 1538 are 2, 769. Prime factorization of 1538 in exponential form is:

1538 = 2¹ × 769¹

Step-2: Prime Factorization of 1557

Prime factors of 1557 are 3, 173. Prime factorization of 1557 in exponential form is:

1557 = 3² × 173¹

Step-3: Factors of 1538

List of positive integer factors of 1538 that divides 1538 without a remainder.

1, 2, 769

Step-4: Factors of 1557

List of positive integer factors of 1557 that divides 1538 without a remainder.

1, 3, 9, 173, 519

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1538 and 1557. The biggest common factor number is the GCF number.
So the greatest common factor 1538 and 1557 is 1.

Also check out the Least Common Multiple of 1538 and 1557