GCD of 389, 388, 690 Calculator

Given Input numbers are 389, 388, 690

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

Divisors of 389

List of positive integer divisors of 389 that divides 389 without a remainder.

1, 389

Divisors of 388

List of positive integer divisors of 388 that divides 388 without a remainder.

1, 2, 4, 97, 194, 388

Divisors of 690

List of positive integer divisors of 690 that divides 690 without a remainder.

1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690

Greatest Common Divisior

We found the divisors of 389, 388, 690 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 389, 388, 690 is 1.

Therefore, GCD of numbers 389, 388, 690 is 1

Given Input Data is 389, 388, 690

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

Prime Factorization of 389 is 389

Prime Factorization of 388 is 2 x 2 x 97

Prime Factorization of 690 is 2 x 3 x 5 x 23

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(389, 388) = 150932

GCD(389, 388) = ( 389 x 388 ) / 150932

GCD(389, 388) = 150932 / 150932

GCD(389, 388) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 690

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

LCM(1, 690) = 690

GCD(1, 690) = ( 1 x 690 ) / 690

GCD(1, 690) = 690 / 690

GCD(1, 690) = 1

GCD of 389, 388, 690 is 1

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1. What is the GCD of 389, 388, 690?

GCD of 389, 388, 690 is 1

2. Where do I get the detailed procedure to find GCD of 389, 388, 690?

You can find a detailed procedure to find GCD of 389, 388, 690 on our page.

3. How to find GCD of 389, 388, 690 on a calculator?

You can find the GCD of 389, 388, 690 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.