What is the Greatest Common Factor of 16405 and 16421?

Greatest common factor (GCF) of 16405 and 16421 is 1.

GCF(16405,16421) = 1

We will now calculate the prime factors of 16405 and 16421, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 16405 and 16421.

How to find the GCF of 16405 and 16421?

We will first find the prime factorization of 16405 and 16421. After we will calculate the factors of 16405 and 16421 and find the biggest common factor number .

Step-1: Prime Factorization of 16405

Prime factors of 16405 are 5, 17, 193. Prime factorization of 16405 in exponential form is:

16405 = 5¹ × 17¹ × 193¹

Step-2: Prime Factorization of 16421

Prime factors of 16421 are 16421. Prime factorization of 16421 in exponential form is:

16421 = 16421¹

Step-3: Factors of 16405

List of positive integer factors of 16405 that divides 16405 without a remainder.

1, 5, 17, 85, 193, 965, 3281

Step-4: Factors of 16421

List of positive integer factors of 16421 that divides 16405 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 16405 and 16421. The biggest common factor number is the GCF number.
So the greatest common factor 16405 and 16421 is 1.

Also check out the Least Common Multiple of 16405 and 16421