GCD of 647, 478, 662, 809 Calculator

Given Input numbers are 647, 478, 662, 809

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

Divisors of 647

List of positive integer divisors of 647 that divides 647 without a remainder.

1, 647

Divisors of 478

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

1, 2, 239, 478

Divisors of 662

List of positive integer divisors of 662 that divides 662 without a remainder.

1, 2, 331, 662

Divisors of 809

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

1, 809

Greatest Common Divisior

We found the divisors of 647, 478, 662, 809 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 647, 478, 662, 809 is 1.

Therefore, GCD of numbers 647, 478, 662, 809 is 1

Given Input Data is 647, 478, 662, 809

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

Prime Factorization of 647 is 647

Prime Factorization of 478 is 2 x 239

Prime Factorization of 662 is 2 x 331

Prime Factorization of 809 is 809

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(647, 478) = 309266

GCD(647, 478) = ( 647 x 478 ) / 309266

GCD(647, 478) = 309266 / 309266

GCD(647, 478) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 662

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

LCM(1, 662) = 662

GCD(1, 662) = ( 1 x 662 ) / 662

GCD(1, 662) = 662 / 662

GCD(1, 662) = 1

Step3:

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

GCD of 647, 478, 662, 809 is 1

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1. What is the GCD of 647, 478, 662, 809?

GCD of 647, 478, 662, 809 is 1

2. Where do I get the detailed procedure to find GCD of 647, 478, 662, 809?

You can find a detailed procedure to find GCD of 647, 478, 662, 809 on our page.

3. How to find GCD of 647, 478, 662, 809 on a calculator?

You can find the GCD of 647, 478, 662, 809 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.