What is the Greatest Common Factor of 21743 and 21760?

Greatest common factor (GCF) of 21743 and 21760 is 17.

GCF(21743,21760) = 17

We will now calculate the prime factors of 21743 and 21760, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21743 and 21760.

How to find the GCF of 21743 and 21760?

We will first find the prime factorization of 21743 and 21760. After we will calculate the factors of 21743 and 21760 and find the biggest common factor number .

Step-1: Prime Factorization of 21743

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

21743 = 17¹ × 1279¹

Step-2: Prime Factorization of 21760

Prime factors of 21760 are 2, 5, 17. Prime factorization of 21760 in exponential form is:

21760 = 2⁸ × 5¹ × 17¹

Step-3: Factors of 21743

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

1, 17, 1279

Step-4: Factors of 21760

List of positive integer factors of 21760 that divides 21743 without a remainder.

1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 544, 640, 680, 1088, 1280, 1360, 2176, 2720, 4352, 5440, 10880

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21743 and 21760. The biggest common factor number is the GCF number.
So the greatest common factor 21743 and 21760 is 17.

Also check out the Least Common Multiple of 21743 and 21760