What is the Greatest Common Factor of 21320 and 21330?

Greatest common factor (GCF) of 21320 and 21330 is 10.

GCF(21320,21330) = 10

We will now calculate the prime factors of 21320 and 21330, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21320 and 21330.

How to find the GCF of 21320 and 21330?

We will first find the prime factorization of 21320 and 21330. After we will calculate the factors of 21320 and 21330 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 21330

Prime factors of 21330 are 2, 3, 5, 79. Prime factorization of 21330 in exponential form is:

21330 = 2¹ × 3³ × 5¹ × 79¹

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 21330

List of positive integer factors of 21330 that divides 21320 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 79, 90, 135, 158, 237, 270, 395, 474, 711, 790, 1185, 1422, 2133, 2370, 3555, 4266, 7110, 10665

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21320 and 21330. The biggest common factor number is the GCF number.
So the greatest common factor 21320 and 21330 is 10.

Also check out the Least Common Multiple of 21320 and 21330