GCD of 821, 643, 638, 117 Calculator

Given Input numbers are 821, 643, 638, 117

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

Divisors of 821 :

The positive integer divisors of 821 that completely divides 821 are.

1, 821

Divisors of 643 :

The positive integer divisors of 643 that completely divides 643 are.

1, 643

Divisors of 638 :

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

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

Divisors of 117 :

The positive integer divisors of 117 that completely divides 117 are.

1, 3, 9, 13, 39, 117

GCD of numbers is the greatest common divisor

So, the GCD (821, 643, 638, 117) = 1.

Given numbers are 821, 643, 638, 117

The list of prime factors of all numbers are

Prime factors of 821 are 821

Prime factors of 643 are 643

Prime factors of 638 are 2 x 11 x 29

Prime factors of 117 are 3 x 3 x 13

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

Given numbers are 821, 643, 638, 117

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

Apply this formula for all numbers.

Step1:

LCM(821, 643) = 527903

GCD(821, 643) = ( 821 x 643 ) / 527903

= 821 / 643

= 821

Step2:

LCM(1, 638) = 638

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

= 1 / 638

= 1

Step3:

LCM(1, 117) = 117

GCD(1, 117) = ( 1 x 117 ) / 117

= 1 / 117

= 1

So, Greatest Common Divisor of 821, 643, 638, 117 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 933, 164, 214, 333
• GCD of 945, 993, 880, 238
• GCD of 103, 194, 556, 682
• GCD of 687, 825, 583, 642
• GCD of 435, 384, 104, 483

Given numbers are 821, 643, 638, 117
The greatest common divisor of numbers 821, 643, 638, 117 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 821, 643, 638, 117 is 1.

1. What is the GCD of 821, 643, 638, 117?

GCD of given numbers 821, 643, 638, 117 is 1

2. How to calculate the greatest common divisor of 821, 643, 638, 117?

We can find the highest common divisor of 821, 643, 638, 117 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 821, 643, 638, 117 i.e 1.

3. How can I use the GCD of 821, 643, 638, 117Calculator?

Out the numbers 821, 643, 638, 117 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.