What is the Greatest Common Factor of 10405 and 10420?

Greatest common factor (GCF) of 10405 and 10420 is 5.

GCF(10405,10420) = 5

We will now calculate the prime factors of 10405 and 10420, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 10405 and 10420.

How to find the GCF of 10405 and 10420?

We will first find the prime factorization of 10405 and 10420. After we will calculate the factors of 10405 and 10420 and find the biggest common factor number .

Step-1: Prime Factorization of 10405

Prime factors of 10405 are 5, 2081. Prime factorization of 10405 in exponential form is:

10405 = 5¹ × 2081¹

Step-2: Prime Factorization of 10420

Prime factors of 10420 are 2, 5, 521. Prime factorization of 10420 in exponential form is:

10420 = 2² × 5¹ × 521¹

Step-3: Factors of 10405

List of positive integer factors of 10405 that divides 10405 without a remainder.

1, 5, 2081

Step-4: Factors of 10420

List of positive integer factors of 10420 that divides 10405 without a remainder.

1, 2, 4, 5, 10, 20, 521, 1042, 2084, 2605, 5210

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 10405 and 10420. The biggest common factor number is the GCF number.
So the greatest common factor 10405 and 10420 is 5.

Also check out the Least Common Multiple of 10405 and 10420