What is the Greatest Common Factor of 21480 and 21488?

Greatest common factor (GCF) of 21480 and 21488 is 8.

GCF(21480,21488) = 8

We will now calculate the prime factors of 21480 and 21488, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21480 and 21488.

How to find the GCF of 21480 and 21488?

We will first find the prime factorization of 21480 and 21488. After we will calculate the factors of 21480 and 21488 and find the biggest common factor number .

Step-1: Prime Factorization of 21480

Prime factors of 21480 are 2, 3, 5, 179. Prime factorization of 21480 in exponential form is:

21480 = 2³ × 3¹ × 5¹ × 179¹

Step-2: Prime Factorization of 21488

Prime factors of 21488 are 2, 17, 79. Prime factorization of 21488 in exponential form is:

21488 = 2⁴ × 17¹ × 79¹

Step-3: Factors of 21480

List of positive integer factors of 21480 that divides 21480 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 179, 358, 537, 716, 895, 1074, 1432, 1790, 2148, 2685, 3580, 4296, 5370, 7160, 10740

Step-4: Factors of 21488

List of positive integer factors of 21488 that divides 21480 without a remainder.

1, 2, 4, 8, 16, 17, 34, 68, 79, 136, 158, 272, 316, 632, 1264, 1343, 2686, 5372, 10744

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21480 and 21488. The biggest common factor number is the GCF number.
So the greatest common factor 21480 and 21488 is 8.

Also check out the Least Common Multiple of 21480 and 21488