What is the Greatest Common Factor of 18438 and 18458?

Greatest common factor (GCF) of 18438 and 18458 is 2.

GCF(18438,18458) = 2

We will now calculate the prime factors of 18438 and 18458, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18438 and 18458.

How to find the GCF of 18438 and 18458?

We will first find the prime factorization of 18438 and 18458. After we will calculate the factors of 18438 and 18458 and find the biggest common factor number .

Step-1: Prime Factorization of 18438

Prime factors of 18438 are 2, 3, 7, 439. Prime factorization of 18438 in exponential form is:

18438 = 2¹ × 3¹ × 7¹ × 439¹

Step-2: Prime Factorization of 18458

Prime factors of 18458 are 2, 11, 839. Prime factorization of 18458 in exponential form is:

18458 = 2¹ × 11¹ × 839¹

Step-3: Factors of 18438

List of positive integer factors of 18438 that divides 18438 without a remainder.

1, 2, 3, 6, 7, 14, 21, 42, 439, 878, 1317, 2634, 3073, 6146, 9219

Step-4: Factors of 18458

List of positive integer factors of 18458 that divides 18438 without a remainder.

1, 2, 11, 22, 839, 1678, 9229

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18438 and 18458. The biggest common factor number is the GCF number.
So the greatest common factor 18438 and 18458 is 2.

Also check out the Least Common Multiple of 18438 and 18458