What is the Greatest Common Factor of 20518 and 20530?

Greatest common factor (GCF) of 20518 and 20530 is 2.

GCF(20518,20530) = 2

We will now calculate the prime factors of 20518 and 20530, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20518 and 20530.

How to find the GCF of 20518 and 20530?

We will first find the prime factorization of 20518 and 20530. After we will calculate the factors of 20518 and 20530 and find the biggest common factor number .

Step-1: Prime Factorization of 20518

Prime factors of 20518 are 2, 10259. Prime factorization of 20518 in exponential form is:

20518 = 2¹ × 10259¹

Step-2: Prime Factorization of 20530

Prime factors of 20530 are 2, 5, 2053. Prime factorization of 20530 in exponential form is:

20530 = 2¹ × 5¹ × 2053¹

Step-3: Factors of 20518

List of positive integer factors of 20518 that divides 20518 without a remainder.

1, 2, 10259

Step-4: Factors of 20530

List of positive integer factors of 20530 that divides 20518 without a remainder.

1, 2, 5, 10, 2053, 4106, 10265

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20518 and 20530. The biggest common factor number is the GCF number.
So the greatest common factor 20518 and 20530 is 2.

Also check out the Least Common Multiple of 20518 and 20530