What is the Greatest Common Factor of 20405 and 20422?

Greatest common factor (GCF) of 20405 and 20422 is 1.

GCF(20405,20422) = 1

We will now calculate the prime factors of 20405 and 20422, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20405 and 20422.

How to find the GCF of 20405 and 20422?

We will first find the prime factorization of 20405 and 20422. After we will calculate the factors of 20405 and 20422 and find the biggest common factor number .

Step-1: Prime Factorization of 20405

Prime factors of 20405 are 5, 7, 11, 53. Prime factorization of 20405 in exponential form is:

20405 = 5¹ × 7¹ × 11¹ × 53¹

Step-2: Prime Factorization of 20422

Prime factors of 20422 are 2, 10211. Prime factorization of 20422 in exponential form is:

20422 = 2¹ × 10211¹

Step-3: Factors of 20405

List of positive integer factors of 20405 that divides 20405 without a remainder.

1, 5, 7, 11, 35, 53, 55, 77, 265, 371, 385, 583, 1855, 2915, 4081

Step-4: Factors of 20422

List of positive integer factors of 20422 that divides 20405 without a remainder.

1, 2, 10211

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20405 and 20422. The biggest common factor number is the GCF number.
So the greatest common factor 20405 and 20422 is 1.

Also check out the Least Common Multiple of 20405 and 20422