What is the Greatest Common Factor of 21780 and 21793?

Greatest common factor (GCF) of 21780 and 21793 is 1.

GCF(21780,21793) = 1

We will now calculate the prime factors of 21780 and 21793, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21780 and 21793.

How to find the GCF of 21780 and 21793?

We will first find the prime factorization of 21780 and 21793. After we will calculate the factors of 21780 and 21793 and find the biggest common factor number .

Step-1: Prime Factorization of 21780

Prime factors of 21780 are 2, 3, 5, 11. Prime factorization of 21780 in exponential form is:

21780 = 2² × 3² × 5¹ × 11²

Step-2: Prime Factorization of 21793

Prime factors of 21793 are 19, 31, 37. Prime factorization of 21793 in exponential form is:

21793 = 19¹ × 31¹ × 37¹

Step-3: Factors of 21780

List of positive integer factors of 21780 that divides 21780 without a remainder.

1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 121, 132, 165, 180, 198, 220, 242, 330, 363, 396, 484, 495, 605, 660, 726, 990, 1089, 1210, 1452, 1815, 1980, 2178, 2420, 3630, 4356, 5445, 7260, 10890

Step-4: Factors of 21793

List of positive integer factors of 21793 that divides 21780 without a remainder.

1, 19, 31, 37, 589, 703, 1147

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21780 and 21793. The biggest common factor number is the GCF number.
So the greatest common factor 21780 and 21793 is 1.

Also check out the Least Common Multiple of 21780 and 21793