GCD of 645, 688, 889, 388 Calculator

Given Input numbers are 645, 688, 889, 388

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

Divisors of 645

List of positive integer divisors of 645 that divides 645 without a remainder.

1, 3, 5, 15, 43, 129, 215, 645

Divisors of 688

List of positive integer divisors of 688 that divides 688 without a remainder.

1, 2, 4, 8, 16, 43, 86, 172, 344, 688

Divisors of 889

List of positive integer divisors of 889 that divides 889 without a remainder.

1, 7, 127, 889

Divisors of 388

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

1, 2, 4, 97, 194, 388

Greatest Common Divisior

We found the divisors of 645, 688, 889, 388 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 645, 688, 889, 388 is 1.

Therefore, GCD of numbers 645, 688, 889, 388 is 1

Given Input Data is 645, 688, 889, 388

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

Prime Factorization of 645 is 3 x 5 x 43

Prime Factorization of 688 is 2 x 2 x 2 x 2 x 43

Prime Factorization of 889 is 7 x 127

Prime Factorization of 388 is 2 x 2 x 97

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(645, 688) = 10320

GCD(645, 688) = ( 645 x 688 ) / 10320

GCD(645, 688) = 443760 / 10320

GCD(645, 688) = 43

Step2:

Here we consider the GCD from the above i.e. 43 as first number and the next as 889

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

LCM(43, 889) = 38227

GCD(43, 889) = ( 43 x 889 ) / 38227

GCD(43, 889) = 38227 / 38227

GCD(43, 889) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 388

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

LCM(1, 388) = 388

GCD(1, 388) = ( 1 x 388 ) / 388

GCD(1, 388) = 388 / 388

GCD(1, 388) = 1

GCD of 645, 688, 889, 388 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 124, 601, 761, 304
• GCD of 951, 327, 154, 585
• GCD of 980, 391, 116, 464
• GCD of 766, 952, 622, 590
• GCD of 475, 778, 768, 800

1. What is the GCD of 645, 688, 889, 388?

GCD of 645, 688, 889, 388 is 1

2. Where do I get the detailed procedure to find GCD of 645, 688, 889, 388?

You can find a detailed procedure to find GCD of 645, 688, 889, 388 on our page.

3. How to find GCD of 645, 688, 889, 388 on a calculator?

You can find the GCD of 645, 688, 889, 388 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.