GCD of 806, 821, 81, 991 Calculator

Given Input numbers are 806, 821, 81, 991

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

Divisors of 806

List of positive integer divisors of 806 that divides 806 without a remainder.

1, 2, 13, 26, 31, 62, 403, 806

Divisors of 821

List of positive integer divisors of 821 that divides 821 without a remainder.

1, 821

Divisors of 81

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

1, 3, 9, 27, 81

Divisors of 991

List of positive integer divisors of 991 that divides 991 without a remainder.

1, 991

Greatest Common Divisior

We found the divisors of 806, 821, 81, 991 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 806, 821, 81, 991 is 1.

Therefore, GCD of numbers 806, 821, 81, 991 is 1

Given Input Data is 806, 821, 81, 991

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

Prime Factorization of 806 is 2 x 13 x 31

Prime Factorization of 821 is 821

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

Prime Factorization of 991 is 991

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(806, 821) = 661726

GCD(806, 821) = ( 806 x 821 ) / 661726

GCD(806, 821) = 661726 / 661726

GCD(806, 821) = 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 991

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

LCM(1, 991) = 991

GCD(1, 991) = ( 1 x 991 ) / 991

GCD(1, 991) = 991 / 991

GCD(1, 991) = 1

GCD of 806, 821, 81, 991 is 1

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1. What is the GCD of 806, 821, 81, 991?

GCD of 806, 821, 81, 991 is 1

2. Where do I get the detailed procedure to find GCD of 806, 821, 81, 991?

You can find a detailed procedure to find GCD of 806, 821, 81, 991 on our page.

3. How to find GCD of 806, 821, 81, 991 on a calculator?

You can find the GCD of 806, 821, 81, 991 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.