What is the Greatest Common Factor of 81438 and 81442?

Greatest common factor (GCF) of 81438 and 81442 is 2.

GCF(81438,81442) = 2

We will now calculate the prime factors of 81438 and 81442, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81438 and 81442.

How to find the GCF of 81438 and 81442?

We will first find the prime factorization of 81438 and 81442. After we will calculate the factors of 81438 and 81442 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 81442

Prime factors of 81442 are 2, 43, 947. Prime factorization of 81442 in exponential form is:

81442 = 2¹ × 43¹ × 947¹

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 81442

List of positive integer factors of 81442 that divides 81438 without a remainder.

1, 2, 43, 86, 947, 1894, 40721

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81438 and 81442. The biggest common factor number is the GCF number.
So the greatest common factor 81438 and 81442 is 2.

Also check out the Least Common Multiple of 81438 and 81442