What is the Greatest Common Factor of 20458 and 20478?

Greatest common factor (GCF) of 20458 and 20478 is 2.

GCF(20458,20478) = 2

We will now calculate the prime factors of 20458 and 20478, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20458 and 20478.

How to find the GCF of 20458 and 20478?

We will first find the prime factorization of 20458 and 20478. After we will calculate the factors of 20458 and 20478 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 20478

Prime factors of 20478 are 2, 3, 3413. Prime factorization of 20478 in exponential form is:

20478 = 2¹ × 3¹ × 3413¹

Step-3: Factors of 20458

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

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

Step-4: Factors of 20478

List of positive integer factors of 20478 that divides 20458 without a remainder.

1, 2, 3, 6, 3413, 6826, 10239

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20458 and 20478. The biggest common factor number is the GCF number.
So the greatest common factor 20458 and 20478 is 2.

Also check out the Least Common Multiple of 20458 and 20478