GCD of 680, 789, 620, 640 Calculator

Given Input numbers are 680, 789, 620, 640

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

Divisors of 680

List of positive integer divisors of 680 that divides 680 without a remainder.

1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680

Divisors of 789

List of positive integer divisors of 789 that divides 789 without a remainder.

1, 3, 263, 789

Divisors of 620

List of positive integer divisors of 620 that divides 620 without a remainder.

1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620

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

Greatest Common Divisior

We found the divisors of 680, 789, 620, 640 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 680, 789, 620, 640 is 1.

Therefore, GCD of numbers 680, 789, 620, 640 is 1

Given Input Data is 680, 789, 620, 640

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

Prime Factorization of 680 is 2 x 2 x 2 x 5 x 17

Prime Factorization of 789 is 3 x 263

Prime Factorization of 620 is 2 x 2 x 5 x 31

Prime Factorization of 640 is 2 x 2 x 2 x 2 x 2 x 2 x 2 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(680, 789) = 536520

GCD(680, 789) = ( 680 x 789 ) / 536520

GCD(680, 789) = 536520 / 536520

GCD(680, 789) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 620

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

LCM(1, 620) = 620

GCD(1, 620) = ( 1 x 620 ) / 620

GCD(1, 620) = 620 / 620

GCD(1, 620) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 640

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

LCM(1, 640) = 640

GCD(1, 640) = ( 1 x 640 ) / 640

GCD(1, 640) = 640 / 640

GCD(1, 640) = 1

GCD of 680, 789, 620, 640 is 1

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1. What is the GCD of 680, 789, 620, 640?

GCD of 680, 789, 620, 640 is 1

2. Where do I get the detailed procedure to find GCD of 680, 789, 620, 640?

You can find a detailed procedure to find GCD of 680, 789, 620, 640 on our page.

3. How to find GCD of 680, 789, 620, 640 on a calculator?

You can find the GCD of 680, 789, 620, 640 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.