What is the Greatest Common Factor of 21709 and 21718?

Greatest common factor (GCF) of 21709 and 21718 is 1.

GCF(21709,21718) = 1

We will now calculate the prime factors of 21709 and 21718, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21709 and 21718.

How to find the GCF of 21709 and 21718?

We will first find the prime factorization of 21709 and 21718. After we will calculate the factors of 21709 and 21718 and find the biggest common factor number .

Step-1: Prime Factorization of 21709

Prime factors of 21709 are 17, 1277. Prime factorization of 21709 in exponential form is:

21709 = 17¹ × 1277¹

Step-2: Prime Factorization of 21718

Prime factors of 21718 are 2, 10859. Prime factorization of 21718 in exponential form is:

21718 = 2¹ × 10859¹

Step-3: Factors of 21709

List of positive integer factors of 21709 that divides 21709 without a remainder.

1, 17, 1277

Step-4: Factors of 21718

List of positive integer factors of 21718 that divides 21709 without a remainder.

1, 2, 10859

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21709 and 21718. The biggest common factor number is the GCF number.
So the greatest common factor 21709 and 21718 is 1.

Also check out the Least Common Multiple of 21709 and 21718