GCD of 640, 390, 99, 672 Calculator

Given Input numbers are 640, 390, 99, 672

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

Divisors of 640

List of positive integer divisors of 640 that divides 640 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640

Divisors of 390

List of positive integer divisors of 390 that divides 390 without a remainder.

1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390

Divisors of 99

List of positive integer divisors of 99 that divides 99 without a remainder.

1, 3, 9, 11, 33, 99

Divisors of 672

List of positive integer divisors of 672 that divides 672 without a remainder.

1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 84, 96, 112, 168, 224, 336, 672

Greatest Common Divisior

We found the divisors of 640, 390, 99, 672 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 640, 390, 99, 672 is 1.

Therefore, GCD of numbers 640, 390, 99, 672 is 1

Given Input Data is 640, 390, 99, 672

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

Prime Factorization of 640 is 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5

Prime Factorization of 390 is 2 x 3 x 5 x 13

Prime Factorization of 99 is 3 x 3 x 11

Prime Factorization of 672 is 2 x 2 x 2 x 2 x 2 x 3 x 7

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(640, 390) = 24960

GCD(640, 390) = ( 640 x 390 ) / 24960

GCD(640, 390) = 249600 / 24960

GCD(640, 390) = 10

Step2:

Here we consider the GCD from the above i.e. 10 as first number and the next as 99

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

LCM(10, 99) = 990

GCD(10, 99) = ( 10 x 99 ) / 990

GCD(10, 99) = 990 / 990

GCD(10, 99) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 672

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

LCM(1, 672) = 672

GCD(1, 672) = ( 1 x 672 ) / 672

GCD(1, 672) = 672 / 672

GCD(1, 672) = 1

GCD of 640, 390, 99, 672 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 319, 636, 60, 607
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• GCD of 314, 112, 24, 965
• GCD of 482, 695, 95, 792
• GCD of 750, 707, 54, 731

1. What is the GCD of 640, 390, 99, 672?

GCD of 640, 390, 99, 672 is 1

2. Where do I get the detailed procedure to find GCD of 640, 390, 99, 672?

You can find a detailed procedure to find GCD of 640, 390, 99, 672 on our page.

3. How to find GCD of 640, 390, 99, 672 on a calculator?

You can find the GCD of 640, 390, 99, 672 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.