What is the Greatest Common Factor of 1538 and 1555?

Greatest common factor (GCF) of 1538 and 1555 is 1.

GCF(1538,1555) = 1

We will now calculate the prime factors of 1538 and 1555, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1538 and 1555.

How to find the GCF of 1538 and 1555?

We will first find the prime factorization of 1538 and 1555. After we will calculate the factors of 1538 and 1555 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 1555

Prime factors of 1555 are 5, 311. Prime factorization of 1555 in exponential form is:

1555 = 5¹ × 311¹

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 1555

List of positive integer factors of 1555 that divides 1538 without a remainder.

1, 5, 311

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1538 and 1555. The biggest common factor number is the GCF number.
So the greatest common factor 1538 and 1555 is 1.

Also check out the Least Common Multiple of 1538 and 1555