What is the Greatest Common Factor of 27721 and 27740?

Greatest common factor (GCF) of 27721 and 27740 is 19.

GCF(27721,27740) = 19

We will now calculate the prime factors of 27721 and 27740, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 27721 and 27740.

How to find the GCF of 27721 and 27740?

We will first find the prime factorization of 27721 and 27740. After we will calculate the factors of 27721 and 27740 and find the biggest common factor number .

Step-1: Prime Factorization of 27721

Prime factors of 27721 are 19, 1459. Prime factorization of 27721 in exponential form is:

27721 = 19¹ × 1459¹

Step-2: Prime Factorization of 27740

Prime factors of 27740 are 2, 5, 19, 73. Prime factorization of 27740 in exponential form is:

27740 = 2² × 5¹ × 19¹ × 73¹

Step-3: Factors of 27721

List of positive integer factors of 27721 that divides 27721 without a remainder.

1, 19, 1459

Step-4: Factors of 27740

List of positive integer factors of 27740 that divides 27721 without a remainder.

1, 2, 4, 5, 10, 19, 20, 38, 73, 76, 95, 146, 190, 292, 365, 380, 730, 1387, 1460, 2774, 5548, 6935, 13870

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 27721 and 27740. The biggest common factor number is the GCF number.
So the greatest common factor 27721 and 27740 is 19.

Also check out the Least Common Multiple of 27721 and 27740