What is the Greatest Common Factor of 20390 and 20399?

Greatest common factor (GCF) of 20390 and 20399 is 1.

GCF(20390,20399) = 1

We will now calculate the prime factors of 20390 and 20399, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20390 and 20399.

How to find the GCF of 20390 and 20399?

We will first find the prime factorization of 20390 and 20399. After we will calculate the factors of 20390 and 20399 and find the biggest common factor number .

Step-1: Prime Factorization of 20390

Prime factors of 20390 are 2, 5, 2039. Prime factorization of 20390 in exponential form is:

20390 = 2¹ × 5¹ × 2039¹

Step-2: Prime Factorization of 20399

Prime factors of 20399 are 20399. Prime factorization of 20399 in exponential form is:

20399 = 20399¹

Step-3: Factors of 20390

List of positive integer factors of 20390 that divides 20390 without a remainder.

1, 2, 5, 10, 2039, 4078, 10195

Step-4: Factors of 20399

List of positive integer factors of 20399 that divides 20390 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20390 and 20399. The biggest common factor number is the GCF number.
So the greatest common factor 20390 and 20399 is 1.

Also check out the Least Common Multiple of 20390 and 20399