What is the Greatest Common Factor of 20438 and 20458?

Greatest common factor (GCF) of 20438 and 20458 is 2.

GCF(20438,20458) = 2

We will now calculate the prime factors of 20438 and 20458, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20438 and 20458.

How to find the GCF of 20438 and 20458?

We will first find the prime factorization of 20438 and 20458. After we will calculate the factors of 20438 and 20458 and find the biggest common factor number .

Step-1: Prime Factorization of 20438

Prime factors of 20438 are 2, 11, 929. Prime factorization of 20438 in exponential form is:

20438 = 2¹ × 11¹ × 929¹

Step-2: Prime Factorization of 20458

Prime factors of 20458 are 2, 53, 193. Prime factorization of 20458 in exponential form is:

20458 = 2¹ × 53¹ × 193¹

Step-3: Factors of 20438

List of positive integer factors of 20438 that divides 20438 without a remainder.

1, 2, 11, 22, 929, 1858, 10219

Step-4: Factors of 20458

List of positive integer factors of 20458 that divides 20438 without a remainder.

1, 2, 53, 106, 193, 386, 10229

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20438 and 20458. The biggest common factor number is the GCF number.
So the greatest common factor 20438 and 20458 is 2.

Also check out the Least Common Multiple of 20438 and 20458