What is the Greatest Common Factor of 42438 and 42455?

Greatest common factor (GCF) of 42438 and 42455 is 1.

GCF(42438,42455) = 1

We will now calculate the prime factors of 42438 and 42455, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42438 and 42455.

How to find the GCF of 42438 and 42455?

We will first find the prime factorization of 42438 and 42455. After we will calculate the factors of 42438 and 42455 and find the biggest common factor number .

Step-1: Prime Factorization of 42438

Prime factors of 42438 are 2, 3, 11, 643. Prime factorization of 42438 in exponential form is:

42438 = 2¹ × 3¹ × 11¹ × 643¹

Step-2: Prime Factorization of 42455

Prime factors of 42455 are 5, 7, 1213. Prime factorization of 42455 in exponential form is:

42455 = 5¹ × 7¹ × 1213¹

Step-3: Factors of 42438

List of positive integer factors of 42438 that divides 42438 without a remainder.

1, 2, 3, 6, 11, 22, 33, 66, 643, 1286, 1929, 3858, 7073, 14146, 21219

Step-4: Factors of 42455

List of positive integer factors of 42455 that divides 42438 without a remainder.

1, 5, 7, 35, 1213, 6065, 8491

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42438 and 42455. The biggest common factor number is the GCF number.
So the greatest common factor 42438 and 42455 is 1.

Also check out the Least Common Multiple of 42438 and 42455