GCD of 691, 170, 81, 646 Calculator

Given Input numbers are 691, 170, 81, 646

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

Divisors of 691

List of positive integer divisors of 691 that divides 691 without a remainder.

1, 691

Divisors of 170

List of positive integer divisors of 170 that divides 170 without a remainder.

1, 2, 5, 10, 17, 34, 85, 170

Divisors of 81

List of positive integer divisors of 81 that divides 81 without a remainder.

1, 3, 9, 27, 81

Divisors of 646

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

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

Greatest Common Divisior

We found the divisors of 691, 170, 81, 646 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 691, 170, 81, 646 is 1.

Therefore, GCD of numbers 691, 170, 81, 646 is 1

Given Input Data is 691, 170, 81, 646

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

Prime Factorization of 691 is 691

Prime Factorization of 170 is 2 x 5 x 17

Prime Factorization of 81 is 3 x 3 x 3 x 3

Prime Factorization of 646 is 2 x 17 x 19

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(691, 170) = 117470

GCD(691, 170) = ( 691 x 170 ) / 117470

GCD(691, 170) = 117470 / 117470

GCD(691, 170) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 81

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

LCM(1, 81) = 81

GCD(1, 81) = ( 1 x 81 ) / 81

GCD(1, 81) = 81 / 81

GCD(1, 81) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 646

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

LCM(1, 646) = 646

GCD(1, 646) = ( 1 x 646 ) / 646

GCD(1, 646) = 646 / 646

GCD(1, 646) = 1

GCD of 691, 170, 81, 646 is 1

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• GCD of 855, 282, 50, 645
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1. What is the GCD of 691, 170, 81, 646?

GCD of 691, 170, 81, 646 is 1

2. Where do I get the detailed procedure to find GCD of 691, 170, 81, 646?

You can find a detailed procedure to find GCD of 691, 170, 81, 646 on our page.

3. How to find GCD of 691, 170, 81, 646 on a calculator?

You can find the GCD of 691, 170, 81, 646 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.