What is the Greatest Common Factor of 42440 and 42455?

Greatest common factor (GCF) of 42440 and 42455 is 5.

GCF(42440,42455) = 5

We will now calculate the prime factors of 42440 and 42455, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42440 and 42455.

How to find the GCF of 42440 and 42455?

We will first find the prime factorization of 42440 and 42455. After we will calculate the factors of 42440 and 42455 and find the biggest common factor number .

Step-1: Prime Factorization of 42440

Prime factors of 42440 are 2, 5, 1061. Prime factorization of 42440 in exponential form is:

42440 = 2³ × 5¹ × 1061¹

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 42440

List of positive integer factors of 42440 that divides 42440 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 1061, 2122, 4244, 5305, 8488, 10610, 21220

Step-4: Factors of 42455

List of positive integer factors of 42455 that divides 42440 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42440 and 42455. The biggest common factor number is the GCF number.
So the greatest common factor 42440 and 42455 is 5.

Also check out the Least Common Multiple of 42440 and 42455