What is the Greatest Common Factor of 15771 and 15781?

Greatest common factor (GCF) of 15771 and 15781 is 1.

GCF(15771,15781) = 1

We will now calculate the prime factors of 15771 and 15781, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15771 and 15781.

How to find the GCF of 15771 and 15781?

We will first find the prime factorization of 15771 and 15781. After we will calculate the factors of 15771 and 15781 and find the biggest common factor number .

Step-1: Prime Factorization of 15771

Prime factors of 15771 are 3, 7, 751. Prime factorization of 15771 in exponential form is:

15771 = 3¹ × 7¹ × 751¹

Step-2: Prime Factorization of 15781

Prime factors of 15781 are 43, 367. Prime factorization of 15781 in exponential form is:

15781 = 43¹ × 367¹

Step-3: Factors of 15771

List of positive integer factors of 15771 that divides 15771 without a remainder.

1, 3, 7, 21, 751, 2253, 5257

Step-4: Factors of 15781

List of positive integer factors of 15781 that divides 15771 without a remainder.

1, 43, 367

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15771 and 15781. The biggest common factor number is the GCF number.
So the greatest common factor 15771 and 15781 is 1.

Also check out the Least Common Multiple of 15771 and 15781