GCD of 639, 681, 840, 831 Calculator

Given Input numbers are 639, 681, 840, 831

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

Divisors of 639 :

The positive integer divisors of 639 that completely divides 639 are.

1, 3, 9, 71, 213, 639

Divisors of 681 :

The positive integer divisors of 681 that completely divides 681 are.

1, 3, 227, 681

Divisors of 840 :

The positive integer divisors of 840 that completely divides 840 are.

1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840

Divisors of 831 :

The positive integer divisors of 831 that completely divides 831 are.

1, 3, 277, 831

GCD of numbers is the greatest common divisor

So, the GCD (639, 681, 840, 831) = 3.

Given numbers are 639, 681, 840, 831

The list of prime factors of all numbers are

Prime factors of 639 are 3 x 3 x 71

Prime factors of 681 are 3 x 227

Prime factors of 840 are 2 x 2 x 2 x 3 x 5 x 7

Prime factors of 831 are 3 x 277

The highest common occurrence is 3¹

Therefore, GCD of 639, 681, 840, 831 is 3.

Given numbers are 639, 681, 840, 831

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

Apply this formula for all numbers.

Step1:

LCM(639, 681) = 145053

GCD(639, 681) = ( 639 x 681 ) / 145053

= 639 / 681

= 639

Step2:

LCM(3, 840) = 840

GCD(3, 840) = ( 3 x 840 ) / 840

= 3 / 840

= 3

Step3:

LCM(3, 831) = 831

GCD(3, 831) = ( 3 x 831 ) / 831

= 3 / 831

= 3

So, Greatest Common Divisor of 639, 681, 840, 831 is 3

Here are some samples of GCD of Numbers calculations.

• GCD of 299, 404, 511, 639
• GCD of 731, 386, 643, 734
• GCD of 776, 421, 784, 138
• GCD of 559, 101, 158, 916
• GCD of 799, 792, 910, 484

Given numbers are 639, 681, 840, 831
The greatest common divisor of numbers 639, 681, 840, 831 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 639, 681, 840, 831 is 3.

1. What is the GCD of 639, 681, 840, 831?

GCD of given numbers 639, 681, 840, 831 is 3

2. How to calculate the greatest common divisor of 639, 681, 840, 831?

We can find the highest common divisor of 639, 681, 840, 831 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 639, 681, 840, 831 i.e 3.

3. How can I use the GCD of 639, 681, 840, 831Calculator?

Out the numbers 639, 681, 840, 831 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.