What is the Greatest Common Factor of 81290 and 81305?

Greatest common factor (GCF) of 81290 and 81305 is 5.

GCF(81290,81305) = 5

We will now calculate the prime factors of 81290 and 81305, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81290 and 81305.

How to find the GCF of 81290 and 81305?

We will first find the prime factorization of 81290 and 81305. After we will calculate the factors of 81290 and 81305 and find the biggest common factor number .

Step-1: Prime Factorization of 81290

Prime factors of 81290 are 2, 5, 11, 739. Prime factorization of 81290 in exponential form is:

81290 = 2¹ × 5¹ × 11¹ × 739¹

Step-2: Prime Factorization of 81305

Prime factors of 81305 are 5, 7, 23, 101. Prime factorization of 81305 in exponential form is:

81305 = 5¹ × 7¹ × 23¹ × 101¹

Step-3: Factors of 81290

List of positive integer factors of 81290 that divides 81290 without a remainder.

1, 2, 5, 10, 11, 22, 55, 110, 739, 1478, 3695, 7390, 8129, 16258, 40645

Step-4: Factors of 81305

List of positive integer factors of 81305 that divides 81290 without a remainder.

1, 5, 7, 23, 35, 101, 115, 161, 505, 707, 805, 2323, 3535, 11615, 16261

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81290 and 81305. The biggest common factor number is the GCF number.
So the greatest common factor 81290 and 81305 is 5.

Also check out the Least Common Multiple of 81290 and 81305