GCD of 644, 326, 685, 420 Calculator

Given Input numbers are 644, 326, 685, 420

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 326 :

The positive integer divisors of 326 that completely divides 326 are.

1, 2, 163, 326

Divisors of 685 :

The positive integer divisors of 685 that completely divides 685 are.

1, 5, 137, 685

Divisors of 420 :

The positive integer divisors of 420 that completely divides 420 are.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420

GCD of numbers is the greatest common divisor

So, the GCD (644, 326, 685, 420) = 1.

Given numbers are 644, 326, 685, 420

The list of prime factors of all numbers are

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

Prime factors of 326 are 2 x 163

Prime factors of 685 are 5 x 137

Prime factors of 420 are 2 x 2 x 3 x 5 x 7

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

Given numbers are 644, 326, 685, 420

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

Apply this formula for all numbers.

Step1:

LCM(644, 326) = 104972

GCD(644, 326) = ( 644 x 326 ) / 104972

= 644 / 326

= 644

Step2:

LCM(2, 685) = 1370

GCD(2, 685) = ( 2 x 685 ) / 1370

= 2 / 685

= 2

Step3:

LCM(1, 420) = 420

GCD(1, 420) = ( 1 x 420 ) / 420

= 1 / 420

= 1

So, Greatest Common Divisor of 644, 326, 685, 420 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 776, 185, 726, 227
• GCD of 992, 790, 489, 217
• GCD of 688, 744, 430, 490
• GCD of 342, 692, 289, 708
• GCD of 149, 878, 347, 396

Given numbers are 644, 326, 685, 420
The greatest common divisor of numbers 644, 326, 685, 420 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 644, 326, 685, 420 is 1.

1. What is the GCD of 644, 326, 685, 420?

GCD of given numbers 644, 326, 685, 420 is 1

2. How to calculate the greatest common divisor of 644, 326, 685, 420?

We can find the highest common divisor of 644, 326, 685, 420 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, 326, 685, 420 i.e 1.

3. How can I use the GCD of 644, 326, 685, 420Calculator?

Out the numbers 644, 326, 685, 420 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.