What is the Greatest Common Factor of 21311 and 21320?

Greatest common factor (GCF) of 21311 and 21320 is 1.

GCF(21311,21320) = 1

We will now calculate the prime factors of 21311 and 21320, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21311 and 21320.

How to find the GCF of 21311 and 21320?

We will first find the prime factorization of 21311 and 21320. After we will calculate the factors of 21311 and 21320 and find the biggest common factor number .

Step-1: Prime Factorization of 21311

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

21311 = 101¹ × 211¹

Step-2: Prime Factorization of 21320

Prime factors of 21320 are 2, 5, 13, 41. Prime factorization of 21320 in exponential form is:

21320 = 2³ × 5¹ × 13¹ × 41¹

Step-3: Factors of 21311

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

1, 101, 211

Step-4: Factors of 21320

List of positive integer factors of 21320 that divides 21311 without a remainder.

1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 82, 104, 130, 164, 205, 260, 328, 410, 520, 533, 820, 1066, 1640, 2132, 2665, 4264, 5330, 10660

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21311 and 21320. The biggest common factor number is the GCF number.
So the greatest common factor 21311 and 21320 is 1.

Also check out the Least Common Multiple of 21311 and 21320