GCD of 645, 423, 165, 631 Calculator

Given Input numbers are 645, 423, 165, 631

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

Divisors of 645 :

The positive integer divisors of 645 that completely divides 645 are.

1, 3, 5, 15, 43, 129, 215, 645

Divisors of 423 :

The positive integer divisors of 423 that completely divides 423 are.

1, 3, 9, 47, 141, 423

Divisors of 165 :

The positive integer divisors of 165 that completely divides 165 are.

1, 3, 5, 11, 15, 33, 55, 165

Divisors of 631 :

The positive integer divisors of 631 that completely divides 631 are.

1, 631

GCD of numbers is the greatest common divisor

So, the GCD (645, 423, 165, 631) = 1.

Given numbers are 645, 423, 165, 631

The list of prime factors of all numbers are

Prime factors of 645 are 3 x 5 x 43

Prime factors of 423 are 3 x 3 x 47

Prime factors of 165 are 3 x 5 x 11

Prime factors of 631 are 631

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

Given numbers are 645, 423, 165, 631

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

Apply this formula for all numbers.

Step1:

LCM(645, 423) = 90945

GCD(645, 423) = ( 645 x 423 ) / 90945

= 645 / 423

= 645

Step2:

LCM(3, 165) = 165

GCD(3, 165) = ( 3 x 165 ) / 165

= 3 / 165

= 3

Step3:

LCM(3, 631) = 1893

GCD(3, 631) = ( 3 x 631 ) / 1893

= 3 / 631

= 3

So, Greatest Common Divisor of 645, 423, 165, 631 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 853, 148, 213, 679
• GCD of 301, 131, 983, 256
• GCD of 655, 453, 571, 902
• GCD of 718, 222, 367, 179
• GCD of 569, 776, 883, 570

Given numbers are 645, 423, 165, 631
The greatest common divisor of numbers 645, 423, 165, 631 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 645, 423, 165, 631 is 1.

1. What is the GCD of 645, 423, 165, 631?

GCD of given numbers 645, 423, 165, 631 is 1

2. How to calculate the greatest common divisor of 645, 423, 165, 631?

We can find the highest common divisor of 645, 423, 165, 631 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 645, 423, 165, 631 i.e 1.

3. How can I use the GCD of 645, 423, 165, 631Calculator?

Out the numbers 645, 423, 165, 631 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.