GCD of 686, 643, 764, 858 Calculator

Given Input numbers are 686, 643, 764, 858

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

Divisors of 686 :

The positive integer divisors of 686 that completely divides 686 are.

1, 2, 7, 14, 49, 98, 343, 686

Divisors of 643 :

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

1, 643

Divisors of 764 :

The positive integer divisors of 764 that completely divides 764 are.

1, 2, 4, 191, 382, 764

Divisors of 858 :

The positive integer divisors of 858 that completely divides 858 are.

1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 66, 78, 143, 286, 429, 858

GCD of numbers is the greatest common divisor

So, the GCD (686, 643, 764, 858) = 1.

Given numbers are 686, 643, 764, 858

The list of prime factors of all numbers are

Prime factors of 686 are 2 x 7 x 7 x 7

Prime factors of 643 are 643

Prime factors of 764 are 2 x 2 x 191

Prime factors of 858 are 2 x 3 x 11 x 13

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

Given numbers are 686, 643, 764, 858

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

Apply this formula for all numbers.

Step1:

LCM(686, 643) = 441098

GCD(686, 643) = ( 686 x 643 ) / 441098

= 686 / 643

= 686

Step2:

LCM(1, 764) = 764

GCD(1, 764) = ( 1 x 764 ) / 764

= 1 / 764

= 1

Step3:

LCM(1, 858) = 858

GCD(1, 858) = ( 1 x 858 ) / 858

= 1 / 858

= 1

So, Greatest Common Divisor of 686, 643, 764, 858 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 118, 545, 506, 111
• GCD of 118, 207, 170, 526
• GCD of 590, 774, 195, 545
• GCD of 498, 736, 569, 149
• GCD of 681, 197, 979, 720

Given numbers are 686, 643, 764, 858
The greatest common divisor of numbers 686, 643, 764, 858 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 686, 643, 764, 858 is 1.

1. What is the GCD of 686, 643, 764, 858?

GCD of given numbers 686, 643, 764, 858 is 1

2. How to calculate the greatest common divisor of 686, 643, 764, 858?

We can find the highest common divisor of 686, 643, 764, 858 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 686, 643, 764, 858 i.e 1.

3. How can I use the GCD of 686, 643, 764, 858Calculator?

Out the numbers 686, 643, 764, 858 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.