GCD of 207, 555, 438, 815 Calculator

Given Input numbers are 207, 555, 438, 815

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

Divisors of 207

List of positive integer divisors of 207 that divides 207 without a remainder.

1, 3, 9, 23, 69, 207

Divisors of 555

List of positive integer divisors of 555 that divides 555 without a remainder.

1, 3, 5, 15, 37, 111, 185, 555

Divisors of 438

List of positive integer divisors of 438 that divides 438 without a remainder.

1, 2, 3, 6, 73, 146, 219, 438

Divisors of 815

List of positive integer divisors of 815 that divides 815 without a remainder.

1, 5, 163, 815

Greatest Common Divisior

We found the divisors of 207, 555, 438, 815 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 207, 555, 438, 815 is 1.

Therefore, GCD of numbers 207, 555, 438, 815 is 1

Given Input Data is 207, 555, 438, 815

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

Prime Factorization of 207 is 3 x 3 x 23

Prime Factorization of 555 is 3 x 5 x 37

Prime Factorization of 438 is 2 x 3 x 73

Prime Factorization of 815 is 5 x 163

The above numbers do not have any common prime factor. So GCD is 1

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(207, 555) = 38295

GCD(207, 555) = ( 207 x 555 ) / 38295

GCD(207, 555) = 114885 / 38295

GCD(207, 555) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 438

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

LCM(3, 438) = 438

GCD(3, 438) = ( 3 x 438 ) / 438

GCD(3, 438) = 1314 / 438

GCD(3, 438) = 3

Step3:

Here we consider the GCD from the above i.e. 3 as first number and the next as 815

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

LCM(3, 815) = 2445

GCD(3, 815) = ( 3 x 815 ) / 2445

GCD(3, 815) = 2445 / 2445

GCD(3, 815) = 1

GCD of 207, 555, 438, 815 is 1

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1. What is the GCD of 207, 555, 438, 815?

GCD of 207, 555, 438, 815 is 1

2. Where do I get the detailed procedure to find GCD of 207, 555, 438, 815?

You can find a detailed procedure to find GCD of 207, 555, 438, 815 on our page.

3. How to find GCD of 207, 555, 438, 815 on a calculator?

You can find the GCD of 207, 555, 438, 815 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.