What is the Greatest Common Factor of 21780 and 21799?

Greatest common factor (GCF) of 21780 and 21799 is 1.

GCF(21780,21799) = 1

We will now calculate the prime factors of 21780 and 21799, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21780 and 21799.

How to find the GCF of 21780 and 21799?

We will first find the prime factorization of 21780 and 21799. After we will calculate the factors of 21780 and 21799 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 21799

Prime factors of 21799 are 21799. Prime factorization of 21799 in exponential form is:

21799 = 21799¹

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 21799

List of positive integer factors of 21799 that divides 21780 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21780 and 21799. The biggest common factor number is the GCF number.
So the greatest common factor 21780 and 21799 is 1.

Also check out the Least Common Multiple of 21780 and 21799