GCD of 644, 626, 129, 638 Calculator

Given Input numbers are 644, 626, 129, 638

In the factoring method, we have to find the divisors of all numbers

Divisors of 644 :

The positive integer divisors of 644 that completely divides 644 are.

1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644

Divisors of 626 :

The positive integer divisors of 626 that completely divides 626 are.

1, 2, 313, 626

Divisors of 129 :

The positive integer divisors of 129 that completely divides 129 are.

1, 3, 43, 129

Divisors of 638 :

The positive integer divisors of 638 that completely divides 638 are.

1, 2, 11, 22, 29, 58, 319, 638

GCD of numbers is the greatest common divisor

So, the GCD (644, 626, 129, 638) = 1.

Given numbers are 644, 626, 129, 638

The list of prime factors of all numbers are

Prime factors of 644 are 2 x 2 x 7 x 23

Prime factors of 626 are 2 x 313

Prime factors of 129 are 3 x 43

Prime factors of 638 are 2 x 11 x 29

The above numbers do not have any common prime factor. So GCD is 1

Given numbers are 644, 626, 129, 638

GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)

Apply this formula for all numbers.

Step1:

LCM(644, 626) = 201572

GCD(644, 626) = ( 644 x 626 ) / 201572

= 644 / 626

= 644

Step2:

LCM(2, 129) = 258

GCD(2, 129) = ( 2 x 129 ) / 258

= 2 / 129

= 2

Step3:

LCM(1, 638) = 638

GCD(1, 638) = ( 1 x 638 ) / 638

= 1 / 638

= 1

So, Greatest Common Divisor of 644, 626, 129, 638 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 575, 208, 795, 707
• GCD of 639, 125, 522, 624
• GCD of 799, 566, 914, 991
• GCD of 859, 880, 375, 898
• GCD of 252, 672, 326, 758

Given numbers are 644, 626, 129, 638
The greatest common divisor of numbers 644, 626, 129, 638 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 644, 626, 129, 638 is 1.

1. What is the GCD of 644, 626, 129, 638?

GCD of given numbers 644, 626, 129, 638 is 1

2. How to calculate the greatest common divisor of 644, 626, 129, 638?

We can find the highest common divisor of 644, 626, 129, 638 easily using the prime factorization method. Just list the prime factors of all numbers and pick the highest common factor which is the GCD of 644, 626, 129, 638 i.e 1.

3. How can I use the GCD of 644, 626, 129, 638Calculator?

Out the numbers 644, 626, 129, 638 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.