What is the Greatest Common Factor of 20420 and 20424?

Greatest common factor (GCF) of 20420 and 20424 is 4.

GCF(20420,20424) = 4

We will now calculate the prime factors of 20420 and 20424, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20420 and 20424.

How to find the GCF of 20420 and 20424?

We will first find the prime factorization of 20420 and 20424. After we will calculate the factors of 20420 and 20424 and find the biggest common factor number .

Step-1: Prime Factorization of 20420

Prime factors of 20420 are 2, 5, 1021. Prime factorization of 20420 in exponential form is:

20420 = 2² × 5¹ × 1021¹

Step-2: Prime Factorization of 20424

Prime factors of 20424 are 2, 3, 23, 37. Prime factorization of 20424 in exponential form is:

20424 = 2³ × 3¹ × 23¹ × 37¹

Step-3: Factors of 20420

List of positive integer factors of 20420 that divides 20420 without a remainder.

1, 2, 4, 5, 10, 20, 1021, 2042, 4084, 5105, 10210

Step-4: Factors of 20424

List of positive integer factors of 20424 that divides 20420 without a remainder.

1, 2, 3, 4, 6, 8, 12, 23, 24, 37, 46, 69, 74, 92, 111, 138, 148, 184, 222, 276, 296, 444, 552, 851, 888, 1702, 2553, 3404, 5106, 6808, 10212

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20420 and 20424. The biggest common factor number is the GCF number.
So the greatest common factor 20420 and 20424 is 4.

Also check out the Least Common Multiple of 20420 and 20424