What is the Greatest Common Factor of 21305 and 21311?

Greatest common factor (GCF) of 21305 and 21311 is 1.

GCF(21305,21311) = 1

We will now calculate the prime factors of 21305 and 21311, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21305 and 21311.

How to find the GCF of 21305 and 21311?

We will first find the prime factorization of 21305 and 21311. After we will calculate the factors of 21305 and 21311 and find the biggest common factor number .

Step-1: Prime Factorization of 21305

Prime factors of 21305 are 5, 4261. Prime factorization of 21305 in exponential form is:

21305 = 5¹ × 4261¹

Step-2: Prime Factorization of 21311

Prime factors of 21311 are 101, 211. Prime factorization of 21311 in exponential form is:

21311 = 101¹ × 211¹

Step-3: Factors of 21305

List of positive integer factors of 21305 that divides 21305 without a remainder.

1, 5, 4261

Step-4: Factors of 21311

List of positive integer factors of 21311 that divides 21305 without a remainder.

1, 101, 211

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21305 and 21311. The biggest common factor number is the GCF number.
So the greatest common factor 21305 and 21311 is 1.

Also check out the Least Common Multiple of 21305 and 21311