GCD of 644, 393, 285 Calculator

Given Input numbers are 644, 393, 285

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

Divisors of 644

List of positive integer divisors of 644 that divides 644 without a remainder.

1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644

Divisors of 393

List of positive integer divisors of 393 that divides 393 without a remainder.

1, 3, 131, 393

Divisors of 285

List of positive integer divisors of 285 that divides 285 without a remainder.

1, 3, 5, 15, 19, 57, 95, 285

Greatest Common Divisior

We found the divisors of 644, 393, 285 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 644, 393, 285 is 1.

Therefore, GCD of numbers 644, 393, 285 is 1

Given Input Data is 644, 393, 285

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

Prime Factorization of 644 is 2 x 2 x 7 x 23

Prime Factorization of 393 is 3 x 131

Prime Factorization of 285 is 3 x 5 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(644, 393) = 253092

GCD(644, 393) = ( 644 x 393 ) / 253092

GCD(644, 393) = 253092 / 253092

GCD(644, 393) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 285

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

LCM(1, 285) = 285

GCD(1, 285) = ( 1 x 285 ) / 285

GCD(1, 285) = 285 / 285

GCD(1, 285) = 1

GCD of 644, 393, 285 is 1

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1. What is the GCD of 644, 393, 285?

GCD of 644, 393, 285 is 1

2. Where do I get the detailed procedure to find GCD of 644, 393, 285?

You can find a detailed procedure to find GCD of 644, 393, 285 on our page.

3. How to find GCD of 644, 393, 285 on a calculator?

You can find the GCD of 644, 393, 285 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.