What is the Greatest Common Factor of 21320 and 21329?

Greatest common factor (GCF) of 21320 and 21329 is 1.

GCF(21320,21329) = 1

We will now calculate the prime factors of 21320 and 21329, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21320 and 21329.

How to find the GCF of 21320 and 21329?

We will first find the prime factorization of 21320 and 21329. After we will calculate the factors of 21320 and 21329 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 21329

Prime factors of 21329 are 7, 11, 277. Prime factorization of 21329 in exponential form is:

21329 = 7¹ × 11¹ × 277¹

Step-3: Factors of 21320

List of positive integer factors of 21320 that divides 21320 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

Step-4: Factors of 21329

List of positive integer factors of 21329 that divides 21320 without a remainder.

1, 7, 11, 77, 277, 1939, 3047

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21320 and 21329. The biggest common factor number is the GCF number.
So the greatest common factor 21320 and 21329 is 1.

Also check out the Least Common Multiple of 21320 and 21329