What is the Greatest Common Factor of 21404 and 21424?

Greatest common factor (GCF) of 21404 and 21424 is 4.

GCF(21404,21424) = 4

We will now calculate the prime factors of 21404 and 21424, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21404 and 21424.

How to find the GCF of 21404 and 21424?

We will first find the prime factorization of 21404 and 21424. After we will calculate the factors of 21404 and 21424 and find the biggest common factor number .

Step-1: Prime Factorization of 21404

Prime factors of 21404 are 2, 5351. Prime factorization of 21404 in exponential form is:

21404 = 2² × 5351¹

Step-2: Prime Factorization of 21424

Prime factors of 21424 are 2, 13, 103. Prime factorization of 21424 in exponential form is:

21424 = 2⁴ × 13¹ × 103¹

Step-3: Factors of 21404

List of positive integer factors of 21404 that divides 21404 without a remainder.

1, 2, 4, 5351, 10702

Step-4: Factors of 21424

List of positive integer factors of 21424 that divides 21404 without a remainder.

1, 2, 4, 8, 13, 16, 26, 52, 103, 104, 206, 208, 412, 824, 1339, 1648, 2678, 5356, 10712

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21404 and 21424. The biggest common factor number is the GCF number.
So the greatest common factor 21404 and 21424 is 4.

Also check out the Least Common Multiple of 21404 and 21424