GCD of 454, 680, 27, 645 Calculator

Given Input numbers are 454, 680, 27, 645

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

Divisors of 454

List of positive integer divisors of 454 that divides 454 without a remainder.

1, 2, 227, 454

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 27

List of positive integer divisors of 27 that divides 27 without a remainder.

1, 3, 9, 27

Divisors of 645

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

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

Greatest Common Divisior

We found the divisors of 454, 680, 27, 645 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 454, 680, 27, 645 is 1.

Therefore, GCD of numbers 454, 680, 27, 645 is 1

Given Input Data is 454, 680, 27, 645

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

Prime Factorization of 454 is 2 x 227

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

Prime Factorization of 27 is 3 x 3 x 3

Prime Factorization of 645 is 3 x 5 x 43

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(454, 680) = 154360

GCD(454, 680) = ( 454 x 680 ) / 154360

GCD(454, 680) = 308720 / 154360

GCD(454, 680) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 27

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

LCM(2, 27) = 54

GCD(2, 27) = ( 2 x 27 ) / 54

GCD(2, 27) = 54 / 54

GCD(2, 27) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 645

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

LCM(1, 645) = 645

GCD(1, 645) = ( 1 x 645 ) / 645

GCD(1, 645) = 645 / 645

GCD(1, 645) = 1

GCD of 454, 680, 27, 645 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 424, 468, 29, 602
• GCD of 363, 986, 46, 141
• GCD of 194, 192, 19, 349
• GCD of 727, 687, 22, 368
• GCD of 405, 453, 48, 158

1. What is the GCD of 454, 680, 27, 645?

GCD of 454, 680, 27, 645 is 1

2. Where do I get the detailed procedure to find GCD of 454, 680, 27, 645?

You can find a detailed procedure to find GCD of 454, 680, 27, 645 on our page.

3. How to find GCD of 454, 680, 27, 645 on a calculator?

You can find the GCD of 454, 680, 27, 645 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.