GCD of 855, 129, 813 Calculator

Given Input numbers are 855, 129, 813

To find the GCD of numbers using factoring list out all the divisors of each number

Divisors of 855

List of positive integer divisors of 855 that divides 855 without a remainder.

1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855

Divisors of 129

List of positive integer divisors of 129 that divides 129 without a remainder.

1, 3, 43, 129

Divisors of 813

List of positive integer divisors of 813 that divides 813 without a remainder.

1, 3, 271, 813

Greatest Common Divisior

We found the divisors of 855, 129, 813 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 855, 129, 813 is 3.

Therefore, GCD of numbers 855, 129, 813 is 3

Given Input Data is 855, 129, 813

Make a list of Prime Factors of all the given numbers initially

Prime Factorization of 855 is 3 x 3 x 5 x 19

Prime Factorization of 129 is 3 x 43

Prime Factorization of 813 is 3 x 271

Highest common occurrences in the given inputs are 3¹

Multiplying them we get the GCD as 3

Step1:

Let's calculate the GCD of first two numbers

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(855, 129) = 36765

GCD(855, 129) = ( 855 x 129 ) / 36765

GCD(855, 129) = 110295 / 36765

GCD(855, 129) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 813

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(3, 813) = 813

GCD(3, 813) = ( 3 x 813 ) / 813

GCD(3, 813) = 2439 / 813

GCD(3, 813) = 3

GCD of 855, 129, 813 is 3

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1. What is the GCD of 855, 129, 813?

GCD of 855, 129, 813 is 3

2. Where do I get the detailed procedure to find GCD of 855, 129, 813?

You can find a detailed procedure to find GCD of 855, 129, 813 on our page.

3. How to find GCD of 855, 129, 813 on a calculator?

You can find the GCD of 855, 129, 813 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.