GCD of 487, 646, 391, 387 Calculator

Given Input numbers are 487, 646, 391, 387

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

Divisors of 487

List of positive integer divisors of 487 that divides 487 without a remainder.

1, 487

Divisors of 646

List of positive integer divisors of 646 that divides 646 without a remainder.

1, 2, 17, 19, 34, 38, 323, 646

Divisors of 391

List of positive integer divisors of 391 that divides 391 without a remainder.

1, 17, 23, 391

Divisors of 387

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

1, 3, 9, 43, 129, 387

Greatest Common Divisior

We found the divisors of 487, 646, 391, 387 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 487, 646, 391, 387 is 1.

Therefore, GCD of numbers 487, 646, 391, 387 is 1

Given Input Data is 487, 646, 391, 387

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

Prime Factorization of 487 is 487

Prime Factorization of 646 is 2 x 17 x 19

Prime Factorization of 391 is 17 x 23

Prime Factorization of 387 is 3 x 3 x 43

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(487, 646) = 314602

GCD(487, 646) = ( 487 x 646 ) / 314602

GCD(487, 646) = 314602 / 314602

GCD(487, 646) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 391

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

LCM(1, 391) = 391

GCD(1, 391) = ( 1 x 391 ) / 391

GCD(1, 391) = 391 / 391

GCD(1, 391) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 387

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

LCM(1, 387) = 387

GCD(1, 387) = ( 1 x 387 ) / 387

GCD(1, 387) = 387 / 387

GCD(1, 387) = 1

GCD of 487, 646, 391, 387 is 1

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1. What is the GCD of 487, 646, 391, 387?

GCD of 487, 646, 391, 387 is 1

2. Where do I get the detailed procedure to find GCD of 487, 646, 391, 387?

You can find a detailed procedure to find GCD of 487, 646, 391, 387 on our page.

3. How to find GCD of 487, 646, 391, 387 on a calculator?

You can find the GCD of 487, 646, 391, 387 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.