GCD of 847, 645, 78, 655 Calculator

Given Input numbers are 847, 645, 78, 655

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

Divisors of 847

List of positive integer divisors of 847 that divides 847 without a remainder.

1, 7, 11, 77, 121, 847

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 78

List of positive integer divisors of 78 that divides 78 without a remainder.

1, 2, 3, 6, 13, 26, 39, 78

Divisors of 655

List of positive integer divisors of 655 that divides 655 without a remainder.

1, 5, 131, 655

Greatest Common Divisior

We found the divisors of 847, 645, 78, 655 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 847, 645, 78, 655 is 1.

Therefore, GCD of numbers 847, 645, 78, 655 is 1

Given Input Data is 847, 645, 78, 655

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

Prime Factorization of 847 is 7 x 11 x 11

Prime Factorization of 645 is 3 x 5 x 43

Prime Factorization of 78 is 2 x 3 x 13

Prime Factorization of 655 is 5 x 131

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(847, 645) = 546315

GCD(847, 645) = ( 847 x 645 ) / 546315

GCD(847, 645) = 546315 / 546315

GCD(847, 645) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 78

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

LCM(1, 78) = 78

GCD(1, 78) = ( 1 x 78 ) / 78

GCD(1, 78) = 78 / 78

GCD(1, 78) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 655

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

LCM(1, 655) = 655

GCD(1, 655) = ( 1 x 655 ) / 655

GCD(1, 655) = 655 / 655

GCD(1, 655) = 1

GCD of 847, 645, 78, 655 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 728, 200, 55, 229
• GCD of 633, 900, 60, 582
• GCD of 353, 678, 12, 453
• GCD of 923, 652, 94, 957
• GCD of 620, 351, 25, 966

1. What is the GCD of 847, 645, 78, 655?

GCD of 847, 645, 78, 655 is 1

2. Where do I get the detailed procedure to find GCD of 847, 645, 78, 655?

You can find a detailed procedure to find GCD of 847, 645, 78, 655 on our page.

3. How to find GCD of 847, 645, 78, 655 on a calculator?

You can find the GCD of 847, 645, 78, 655 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.