GCD of 747, 858, 20, 645 Calculator

Given Input numbers are 747, 858, 20, 645

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

Divisors of 747 :

The positive integer divisors of 747 that completely divides 747 are.

1, 3, 9, 83, 249, 747

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

Divisors of 20 :

The positive integer divisors of 20 that completely divides 20 are.

1, 2, 4, 5, 10, 20

Divisors of 645 :

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

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

GCD of numbers is the greatest common divisor

So, the GCD (747, 858, 20, 645) = 1.

Given numbers are 747, 858, 20, 645

The list of prime factors of all numbers are

Prime factors of 747 are 3 x 3 x 83

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

Prime factors of 20 are 2 x 2 x 5

Prime factors of 645 are 3 x 5 x 43

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

Given numbers are 747, 858, 20, 645

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

Apply this formula for all numbers.

Step1:

LCM(747, 858) = 213642

GCD(747, 858) = ( 747 x 858 ) / 213642

= 747 / 858

= 747

Step2:

LCM(3, 20) = 60

GCD(3, 20) = ( 3 x 20 ) / 60

= 3 / 20

= 3

Step3:

LCM(1, 645) = 645

GCD(1, 645) = ( 1 x 645 ) / 645

= 1 / 645

= 1

So, Greatest Common Divisor of 747, 858, 20, 645 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 902, 359, 88, 809
• GCD of 678, 136, 36, 580
• GCD of 123, 694, 70, 616
• GCD of 941, 612, 37, 780
• GCD of 308, 720, 39, 523

Given numbers are 747, 858, 20, 645
The greatest common divisor of numbers 747, 858, 20, 645 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 747, 858, 20, 645 is 1.

1. What is the GCD of 747, 858, 20, 645?

GCD of given numbers 747, 858, 20, 645 is 1

2. How to calculate the greatest common divisor of 747, 858, 20, 645?

We can find the highest common divisor of 747, 858, 20, 645 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 747, 858, 20, 645 i.e 1.

3. How can I use the GCD of 747, 858, 20, 645Calculator?

Out the numbers 747, 858, 20, 645 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.