What is the Greatest Common Factor of 42401 and 42420?

Greatest common factor (GCF) of 42401 and 42420 is 1.

GCF(42401,42420) = 1

We will now calculate the prime factors of 42401 and 42420, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42401 and 42420.

How to find the GCF of 42401 and 42420?

We will first find the prime factorization of 42401 and 42420. After we will calculate the factors of 42401 and 42420 and find the biggest common factor number .

Step-1: Prime Factorization of 42401

Prime factors of 42401 are 109, 389. Prime factorization of 42401 in exponential form is:

42401 = 109¹ × 389¹

Step-2: Prime Factorization of 42420

Prime factors of 42420 are 2, 3, 5, 7, 101. Prime factorization of 42420 in exponential form is:

42420 = 2² × 3¹ × 5¹ × 7¹ × 101¹

Step-3: Factors of 42401

List of positive integer factors of 42401 that divides 42401 without a remainder.

1, 109, 389

Step-4: Factors of 42420

List of positive integer factors of 42420 that divides 42401 without a remainder.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 101, 105, 140, 202, 210, 303, 404, 420, 505, 606, 707, 1010, 1212, 1414, 1515, 2020, 2121, 2828, 3030, 3535, 4242, 6060, 7070, 8484, 10605, 14140, 21210

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42401 and 42420. The biggest common factor number is the GCF number.
So the greatest common factor 42401 and 42420 is 1.

Also check out the Least Common Multiple of 42401 and 42420