GCD of 644, 388, 67, 617 Calculator

Given Input numbers are 644, 388, 67, 617

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 388

List of positive integer divisors of 388 that divides 388 without a remainder.

1, 2, 4, 97, 194, 388

Divisors of 67

List of positive integer divisors of 67 that divides 67 without a remainder.

1, 67

Divisors of 617

List of positive integer divisors of 617 that divides 617 without a remainder.

1, 617

Greatest Common Divisior

We found the divisors of 644, 388, 67, 617 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 644, 388, 67, 617 is 1.

Therefore, GCD of numbers 644, 388, 67, 617 is 1

Given Input Data is 644, 388, 67, 617

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 388 is 2 x 2 x 97

Prime Factorization of 67 is 67

Prime Factorization of 617 is 617

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, 388) = 62468

GCD(644, 388) = ( 644 x 388 ) / 62468

GCD(644, 388) = 249872 / 62468

GCD(644, 388) = 4

Step2:

Here we consider the GCD from the above i.e. 4 as first number and the next as 67

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

LCM(4, 67) = 268

GCD(4, 67) = ( 4 x 67 ) / 268

GCD(4, 67) = 268 / 268

GCD(4, 67) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 617

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

LCM(1, 617) = 617

GCD(1, 617) = ( 1 x 617 ) / 617

GCD(1, 617) = 617 / 617

GCD(1, 617) = 1

GCD of 644, 388, 67, 617 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 925, 265, 95, 920
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1. What is the GCD of 644, 388, 67, 617?

GCD of 644, 388, 67, 617 is 1

2. Where do I get the detailed procedure to find GCD of 644, 388, 67, 617?

You can find a detailed procedure to find GCD of 644, 388, 67, 617 on our page.

3. How to find GCD of 644, 388, 67, 617 on a calculator?

You can find the GCD of 644, 388, 67, 617 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.