GCD of 645, 428, 990, 427 Calculator

Given Input numbers are 645, 428, 990, 427

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 428 :

The positive integer divisors of 428 that completely divides 428 are.

1, 2, 4, 107, 214, 428

Divisors of 990 :

The positive integer divisors of 990 that completely divides 990 are.

1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990

Divisors of 427 :

The positive integer divisors of 427 that completely divides 427 are.

1, 7, 61, 427

GCD of numbers is the greatest common divisor

So, the GCD (645, 428, 990, 427) = 1.

Given numbers are 645, 428, 990, 427

The list of prime factors of all numbers are

Prime factors of 645 are 3 x 5 x 43

Prime factors of 428 are 2 x 2 x 107

Prime factors of 990 are 2 x 3 x 3 x 5 x 11

Prime factors of 427 are 7 x 61

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

Given numbers are 645, 428, 990, 427

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

Apply this formula for all numbers.

Step1:

LCM(645, 428) = 276060

GCD(645, 428) = ( 645 x 428 ) / 276060

= 645 / 428

= 645

Step2:

LCM(1, 990) = 990

GCD(1, 990) = ( 1 x 990 ) / 990

= 1 / 990

= 1

Step3:

LCM(1, 427) = 427

GCD(1, 427) = ( 1 x 427 ) / 427

= 1 / 427

= 1

So, Greatest Common Divisor of 645, 428, 990, 427 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 902, 357, 534, 214
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• GCD of 100, 491, 621, 284

Given numbers are 645, 428, 990, 427
The greatest common divisor of numbers 645, 428, 990, 427 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 645, 428, 990, 427 is 1.

1. What is the GCD of 645, 428, 990, 427?

GCD of given numbers 645, 428, 990, 427 is 1

2. How to calculate the greatest common divisor of 645, 428, 990, 427?

We can find the highest common divisor of 645, 428, 990, 427 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, 428, 990, 427 i.e 1.

3. How can I use the GCD of 645, 428, 990, 427Calculator?

Out the numbers 645, 428, 990, 427 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.