GCD of 815, 387, 809, 478 Calculator

Given Input numbers are 815, 387, 809, 478

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

Divisors of 815

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

1, 5, 163, 815

Divisors of 387

List of positive integer divisors of 387 that divides 387 without a remainder.

1, 3, 9, 43, 129, 387

Divisors of 809

List of positive integer divisors of 809 that divides 809 without a remainder.

1, 809

Divisors of 478

List of positive integer divisors of 478 that divides 478 without a remainder.

1, 2, 239, 478

Greatest Common Divisior

We found the divisors of 815, 387, 809, 478 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 815, 387, 809, 478 is 1.

Therefore, GCD of numbers 815, 387, 809, 478 is 1

Given Input Data is 815, 387, 809, 478

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

Prime Factorization of 815 is 5 x 163

Prime Factorization of 387 is 3 x 3 x 43

Prime Factorization of 809 is 809

Prime Factorization of 478 is 2 x 239

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(815, 387) = 315405

GCD(815, 387) = ( 815 x 387 ) / 315405

GCD(815, 387) = 315405 / 315405

GCD(815, 387) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 809

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

LCM(1, 809) = 809

GCD(1, 809) = ( 1 x 809 ) / 809

GCD(1, 809) = 809 / 809

GCD(1, 809) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 478

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

LCM(1, 478) = 478

GCD(1, 478) = ( 1 x 478 ) / 478

GCD(1, 478) = 478 / 478

GCD(1, 478) = 1

GCD of 815, 387, 809, 478 is 1

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• GCD of 308, 130, 355, 375
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1. What is the GCD of 815, 387, 809, 478?

GCD of 815, 387, 809, 478 is 1

2. Where do I get the detailed procedure to find GCD of 815, 387, 809, 478?

You can find a detailed procedure to find GCD of 815, 387, 809, 478 on our page.

3. How to find GCD of 815, 387, 809, 478 on a calculator?

You can find the GCD of 815, 387, 809, 478 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.