GCD of 638, 945, 80, 810 Calculator

Given Input numbers are 638, 945, 80, 810

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

Divisors of 638

List of positive integer divisors of 638 that divides 638 without a remainder.

1, 2, 11, 22, 29, 58, 319, 638

Divisors of 945

List of positive integer divisors of 945 that divides 945 without a remainder.

1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945

Divisors of 80

List of positive integer divisors of 80 that divides 80 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Divisors of 810

List of positive integer divisors of 810 that divides 810 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810

Greatest Common Divisior

We found the divisors of 638, 945, 80, 810 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 638, 945, 80, 810 is 1.

Therefore, GCD of numbers 638, 945, 80, 810 is 1

Given Input Data is 638, 945, 80, 810

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

Prime Factorization of 638 is 2 x 11 x 29

Prime Factorization of 945 is 3 x 3 x 3 x 5 x 7

Prime Factorization of 80 is 2 x 2 x 2 x 2 x 5

Prime Factorization of 810 is 2 x 3 x 3 x 3 x 3 x 5

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(638, 945) = 602910

GCD(638, 945) = ( 638 x 945 ) / 602910

GCD(638, 945) = 602910 / 602910

GCD(638, 945) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 80

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

LCM(1, 80) = 80

GCD(1, 80) = ( 1 x 80 ) / 80

GCD(1, 80) = 80 / 80

GCD(1, 80) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 810

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

LCM(1, 810) = 810

GCD(1, 810) = ( 1 x 810 ) / 810

GCD(1, 810) = 810 / 810

GCD(1, 810) = 1

GCD of 638, 945, 80, 810 is 1

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1. What is the GCD of 638, 945, 80, 810?

GCD of 638, 945, 80, 810 is 1

2. Where do I get the detailed procedure to find GCD of 638, 945, 80, 810?

You can find a detailed procedure to find GCD of 638, 945, 80, 810 on our page.

3. How to find GCD of 638, 945, 80, 810 on a calculator?

You can find the GCD of 638, 945, 80, 810 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.