What is the Greatest Common Factor of 21510 and 21518?

Greatest common factor (GCF) of 21510 and 21518 is 2.

GCF(21510,21518) = 2

We will now calculate the prime factors of 21510 and 21518, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21510 and 21518.

How to find the GCF of 21510 and 21518?

We will first find the prime factorization of 21510 and 21518. After we will calculate the factors of 21510 and 21518 and find the biggest common factor number .

Step-1: Prime Factorization of 21510

Prime factors of 21510 are 2, 3, 5, 239. Prime factorization of 21510 in exponential form is:

21510 = 2¹ × 3² × 5¹ × 239¹

Step-2: Prime Factorization of 21518

Prime factors of 21518 are 2, 7, 29, 53. Prime factorization of 21518 in exponential form is:

21518 = 2¹ × 7¹ × 29¹ × 53¹

Step-3: Factors of 21510

List of positive integer factors of 21510 that divides 21510 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 239, 478, 717, 1195, 1434, 2151, 2390, 3585, 4302, 7170, 10755

Step-4: Factors of 21518

List of positive integer factors of 21518 that divides 21510 without a remainder.

1, 2, 7, 14, 29, 53, 58, 106, 203, 371, 406, 742, 1537, 3074, 10759

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21510 and 21518. The biggest common factor number is the GCF number.
So the greatest common factor 21510 and 21518 is 2.

Also check out the Least Common Multiple of 21510 and 21518