GCD of 640, 365, 830, 781 Calculator

Given Input numbers are 640, 365, 830, 781

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 365

List of positive integer divisors of 365 that divides 365 without a remainder.

1, 5, 73, 365

Divisors of 830

List of positive integer divisors of 830 that divides 830 without a remainder.

1, 2, 5, 10, 83, 166, 415, 830

Divisors of 781

List of positive integer divisors of 781 that divides 781 without a remainder.

1, 11, 71, 781

Greatest Common Divisior

We found the divisors of 640, 365, 830, 781 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 640, 365, 830, 781 is 1.

Therefore, GCD of numbers 640, 365, 830, 781 is 1

Given Input Data is 640, 365, 830, 781

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 365 is 5 x 73

Prime Factorization of 830 is 2 x 5 x 83

Prime Factorization of 781 is 11 x 71

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, 365) = 46720

GCD(640, 365) = ( 640 x 365 ) / 46720

GCD(640, 365) = 233600 / 46720

GCD(640, 365) = 5

Step2:

Here we consider the GCD from the above i.e. 5 as first number and the next as 830

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

LCM(5, 830) = 830

GCD(5, 830) = ( 5 x 830 ) / 830

GCD(5, 830) = 4150 / 830

GCD(5, 830) = 5

Step3:

Here we consider the GCD from the above i.e. 5 as first number and the next as 781

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

LCM(5, 781) = 3905

GCD(5, 781) = ( 5 x 781 ) / 3905

GCD(5, 781) = 3905 / 3905

GCD(5, 781) = 1

GCD of 640, 365, 830, 781 is 1

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1. What is the GCD of 640, 365, 830, 781?

GCD of 640, 365, 830, 781 is 1

2. Where do I get the detailed procedure to find GCD of 640, 365, 830, 781?

You can find a detailed procedure to find GCD of 640, 365, 830, 781 on our page.

3. How to find GCD of 640, 365, 830, 781 on a calculator?

You can find the GCD of 640, 365, 830, 781 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.