GCD of 643, 989, 247 Calculator

Given Input numbers are 643, 989, 247

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

Divisors of 643

List of positive integer divisors of 643 that divides 643 without a remainder.

1, 643

Divisors of 989

List of positive integer divisors of 989 that divides 989 without a remainder.

1, 23, 43, 989

Divisors of 247

List of positive integer divisors of 247 that divides 247 without a remainder.

1, 13, 19, 247

Greatest Common Divisior

We found the divisors of 643, 989, 247 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 643, 989, 247 is 1.

Therefore, GCD of numbers 643, 989, 247 is 1

Given Input Data is 643, 989, 247

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

Prime Factorization of 643 is 643

Prime Factorization of 989 is 23 x 43

Prime Factorization of 247 is 13 x 19

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(643, 989) = 635927

GCD(643, 989) = ( 643 x 989 ) / 635927

GCD(643, 989) = 635927 / 635927

GCD(643, 989) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 247

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

LCM(1, 247) = 247

GCD(1, 247) = ( 1 x 247 ) / 247

GCD(1, 247) = 247 / 247

GCD(1, 247) = 1

GCD of 643, 989, 247 is 1

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• GCD of 257, 708, 796
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1. What is the GCD of 643, 989, 247?

GCD of 643, 989, 247 is 1

2. Where do I get the detailed procedure to find GCD of 643, 989, 247?

You can find a detailed procedure to find GCD of 643, 989, 247 on our page.

3. How to find GCD of 643, 989, 247 on a calculator?

You can find the GCD of 643, 989, 247 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.