GCD of 644, 670, 18, 557 Calculator

Given Input numbers are 644, 670, 18, 557

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 670 :

The positive integer divisors of 670 that completely divides 670 are.

1, 2, 5, 10, 67, 134, 335, 670

Divisors of 18 :

The positive integer divisors of 18 that completely divides 18 are.

1, 2, 3, 6, 9, 18

Divisors of 557 :

The positive integer divisors of 557 that completely divides 557 are.

1, 557

GCD of numbers is the greatest common divisor

So, the GCD (644, 670, 18, 557) = 1.

Given numbers are 644, 670, 18, 557

The list of prime factors of all numbers are

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

Prime factors of 670 are 2 x 5 x 67

Prime factors of 18 are 2 x 3 x 3

Prime factors of 557 are 557

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

Given numbers are 644, 670, 18, 557

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

Apply this formula for all numbers.

Step1:

LCM(644, 670) = 215740

GCD(644, 670) = ( 644 x 670 ) / 215740

= 644 / 670

= 644

Step2:

LCM(2, 18) = 18

GCD(2, 18) = ( 2 x 18 ) / 18

= 2 / 18

= 2

Step3:

LCM(2, 557) = 1114

GCD(2, 557) = ( 2 x 557 ) / 1114

= 2 / 557

= 2

So, Greatest Common Divisor of 644, 670, 18, 557 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 625, 854, 14, 901
• GCD of 261, 351, 71, 446
• GCD of 315, 234, 82, 791
• GCD of 155, 564, 44, 206
• GCD of 227, 938, 89, 434

Given numbers are 644, 670, 18, 557
The greatest common divisor of numbers 644, 670, 18, 557 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 644, 670, 18, 557 is 1.

1. What is the GCD of 644, 670, 18, 557?

GCD of given numbers 644, 670, 18, 557 is 1

2. How to calculate the greatest common divisor of 644, 670, 18, 557?

We can find the highest common divisor of 644, 670, 18, 557 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, 670, 18, 557 i.e 1.

3. How can I use the GCD of 644, 670, 18, 557Calculator?

Out the numbers 644, 670, 18, 557 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.