GCD of 640, 408, 671 Calculator

Given Input numbers are 640, 408, 671

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

Divisors of 640

List of positive integer divisors of 640 that divides 640 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640

Divisors of 408

List of positive integer divisors of 408 that divides 408 without a remainder.

1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408

Divisors of 671

List of positive integer divisors of 671 that divides 671 without a remainder.

1, 11, 61, 671

Greatest Common Divisior

We found the divisors of 640, 408, 671 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 640, 408, 671 is 1.

Therefore, GCD of numbers 640, 408, 671 is 1

Given Input Data is 640, 408, 671

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

Prime Factorization of 640 is 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5

Prime Factorization of 408 is 2 x 2 x 2 x 3 x 17

Prime Factorization of 671 is 11 x 61

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(640, 408) = 32640

GCD(640, 408) = ( 640 x 408 ) / 32640

GCD(640, 408) = 261120 / 32640

GCD(640, 408) = 8

Step2:

Here we consider the GCD from the above i.e. 8 as first number and the next as 671

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

LCM(8, 671) = 5368

GCD(8, 671) = ( 8 x 671 ) / 5368

GCD(8, 671) = 5368 / 5368

GCD(8, 671) = 1

GCD of 640, 408, 671 is 1

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1. What is the GCD of 640, 408, 671?

GCD of 640, 408, 671 is 1

2. Where do I get the detailed procedure to find GCD of 640, 408, 671?

You can find a detailed procedure to find GCD of 640, 408, 671 on our page.

3. How to find GCD of 640, 408, 671 on a calculator?

You can find the GCD of 640, 408, 671 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.