What is the Greatest Common Factor of 18420 and 18439?

Greatest common factor (GCF) of 18420 and 18439 is 1.

GCF(18420,18439) = 1

We will now calculate the prime factors of 18420 and 18439, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18420 and 18439.

How to find the GCF of 18420 and 18439?

We will first find the prime factorization of 18420 and 18439. After we will calculate the factors of 18420 and 18439 and find the biggest common factor number .

Step-1: Prime Factorization of 18420

Prime factors of 18420 are 2, 3, 5, 307. Prime factorization of 18420 in exponential form is:

18420 = 2² × 3¹ × 5¹ × 307¹

Step-2: Prime Factorization of 18439

Prime factors of 18439 are 18439. Prime factorization of 18439 in exponential form is:

18439 = 18439¹

Step-3: Factors of 18420

List of positive integer factors of 18420 that divides 18420 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 307, 614, 921, 1228, 1535, 1842, 3070, 3684, 4605, 6140, 9210

Step-4: Factors of 18439

List of positive integer factors of 18439 that divides 18420 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18420 and 18439. The biggest common factor number is the GCF number.
So the greatest common factor 18420 and 18439 is 1.

Also check out the Least Common Multiple of 18420 and 18439