What is the Greatest Common Factor of 81380 and 81391?

Greatest common factor (GCF) of 81380 and 81391 is 1.

GCF(81380,81391) = 1

We will now calculate the prime factors of 81380 and 81391, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81380 and 81391.

How to find the GCF of 81380 and 81391?

We will first find the prime factorization of 81380 and 81391. After we will calculate the factors of 81380 and 81391 and find the biggest common factor number .

Step-1: Prime Factorization of 81380

Prime factors of 81380 are 2, 5, 13, 313. Prime factorization of 81380 in exponential form is:

81380 = 2² × 5¹ × 13¹ × 313¹

Step-2: Prime Factorization of 81391

Prime factors of 81391 are 199, 409. Prime factorization of 81391 in exponential form is:

81391 = 199¹ × 409¹

Step-3: Factors of 81380

List of positive integer factors of 81380 that divides 81380 without a remainder.

1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 313, 626, 1252, 1565, 3130, 4069, 6260, 8138, 16276, 20345, 40690

Step-4: Factors of 81391

List of positive integer factors of 81391 that divides 81380 without a remainder.

1, 199, 409

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81380 and 81391. The biggest common factor number is the GCF number.
So the greatest common factor 81380 and 81391 is 1.

Also check out the Least Common Multiple of 81380 and 81391