What is the Greatest Common Factor of 81438 and 81447?

Greatest common factor (GCF) of 81438 and 81447 is 3.

GCF(81438,81447) = 3

We will now calculate the prime factors of 81438 and 81447, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81438 and 81447.

How to find the GCF of 81438 and 81447?

We will first find the prime factorization of 81438 and 81447. After we will calculate the factors of 81438 and 81447 and find the biggest common factor number .

Step-1: Prime Factorization of 81438

Prime factors of 81438 are 2, 3, 7, 277. Prime factorization of 81438 in exponential form is:

81438 = 2¹ × 3¹ × 7² × 277¹

Step-2: Prime Factorization of 81447

Prime factors of 81447 are 3, 17, 1597. Prime factorization of 81447 in exponential form is:

81447 = 3¹ × 17¹ × 1597¹

Step-3: Factors of 81438

List of positive integer factors of 81438 that divides 81438 without a remainder.

1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 277, 294, 554, 831, 1662, 1939, 3878, 5817, 11634, 13573, 27146, 40719

Step-4: Factors of 81447

List of positive integer factors of 81447 that divides 81438 without a remainder.

1, 3, 17, 51, 1597, 4791, 27149

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81438 and 81447. The biggest common factor number is the GCF number.
So the greatest common factor 81438 and 81447 is 3.

Also check out the Least Common Multiple of 81438 and 81447