What is the Greatest Common Factor of 21729 and 21739?

Greatest common factor (GCF) of 21729 and 21739 is 1.

GCF(21729,21739) = 1

We will now calculate the prime factors of 21729 and 21739, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21729 and 21739.

How to find the GCF of 21729 and 21739?

We will first find the prime factorization of 21729 and 21739. After we will calculate the factors of 21729 and 21739 and find the biggest common factor number .

Step-1: Prime Factorization of 21729

Prime factors of 21729 are 3, 7243. Prime factorization of 21729 in exponential form is:

21729 = 3¹ × 7243¹

Step-2: Prime Factorization of 21739

Prime factors of 21739 are 21739. Prime factorization of 21739 in exponential form is:

21739 = 21739¹

Step-3: Factors of 21729

List of positive integer factors of 21729 that divides 21729 without a remainder.

1, 3, 7243

Step-4: Factors of 21739

List of positive integer factors of 21739 that divides 21729 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21729 and 21739. The biggest common factor number is the GCF number.
So the greatest common factor 21729 and 21739 is 1.

Also check out the Least Common Multiple of 21729 and 21739