What is the Greatest Common Factor of 21728 and 21743?

Greatest common factor (GCF) of 21728 and 21743 is 1.

GCF(21728,21743) = 1

We will now calculate the prime factors of 21728 and 21743, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21728 and 21743.

How to find the GCF of 21728 and 21743?

We will first find the prime factorization of 21728 and 21743. After we will calculate the factors of 21728 and 21743 and find the biggest common factor number .

Step-1: Prime Factorization of 21728

Prime factors of 21728 are 2, 7, 97. Prime factorization of 21728 in exponential form is:

21728 = 2⁵ × 7¹ × 97¹

Step-2: Prime Factorization of 21743

Prime factors of 21743 are 17, 1279. Prime factorization of 21743 in exponential form is:

21743 = 17¹ × 1279¹

Step-3: Factors of 21728

List of positive integer factors of 21728 that divides 21728 without a remainder.

1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 97, 112, 194, 224, 388, 679, 776, 1358, 1552, 2716, 3104, 5432, 10864

Step-4: Factors of 21743

List of positive integer factors of 21743 that divides 21728 without a remainder.

1, 17, 1279

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21728 and 21743. The biggest common factor number is the GCF number.
So the greatest common factor 21728 and 21743 is 1.

Also check out the Least Common Multiple of 21728 and 21743