What is the Greatest Common Factor of 20670 and 20687?

Greatest common factor (GCF) of 20670 and 20687 is 1.

GCF(20670,20687) = 1

We will now calculate the prime factors of 20670 and 20687, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20670 and 20687.

How to find the GCF of 20670 and 20687?

We will first find the prime factorization of 20670 and 20687. After we will calculate the factors of 20670 and 20687 and find the biggest common factor number .

Step-1: Prime Factorization of 20670

Prime factors of 20670 are 2, 3, 5, 13, 53. Prime factorization of 20670 in exponential form is:

20670 = 2¹ × 3¹ × 5¹ × 13¹ × 53¹

Step-2: Prime Factorization of 20687

Prime factors of 20687 are 137, 151. Prime factorization of 20687 in exponential form is:

20687 = 137¹ × 151¹

Step-3: Factors of 20670

List of positive integer factors of 20670 that divides 20670 without a remainder.

1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 53, 65, 78, 106, 130, 159, 195, 265, 318, 390, 530, 689, 795, 1378, 1590, 2067, 3445, 4134, 6890, 10335

Step-4: Factors of 20687

List of positive integer factors of 20687 that divides 20670 without a remainder.

1, 137, 151

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20670 and 20687. The biggest common factor number is the GCF number.
So the greatest common factor 20670 and 20687 is 1.

Also check out the Least Common Multiple of 20670 and 20687