GCD of 981, 138, 638, 688 Calculator

Given Input numbers are 981, 138, 638, 688

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

Divisors of 981 :

The positive integer divisors of 981 that completely divides 981 are.

1, 3, 9, 109, 327, 981

Divisors of 138 :

The positive integer divisors of 138 that completely divides 138 are.

1, 2, 3, 6, 23, 46, 69, 138

Divisors of 638 :

The positive integer divisors of 638 that completely divides 638 are.

1, 2, 11, 22, 29, 58, 319, 638

Divisors of 688 :

The positive integer divisors of 688 that completely divides 688 are.

1, 2, 4, 8, 16, 43, 86, 172, 344, 688

GCD of numbers is the greatest common divisor

So, the GCD (981, 138, 638, 688) = 1.

Given numbers are 981, 138, 638, 688

The list of prime factors of all numbers are

Prime factors of 981 are 3 x 3 x 109

Prime factors of 138 are 2 x 3 x 23

Prime factors of 638 are 2 x 11 x 29

Prime factors of 688 are 2 x 2 x 2 x 2 x 43

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

Given numbers are 981, 138, 638, 688

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

Apply this formula for all numbers.

Step1:

LCM(981, 138) = 45126

GCD(981, 138) = ( 981 x 138 ) / 45126

= 981 / 138

= 981

Step2:

LCM(3, 638) = 1914

GCD(3, 638) = ( 3 x 638 ) / 1914

= 3 / 638

= 3

Step3:

LCM(1, 688) = 688

GCD(1, 688) = ( 1 x 688 ) / 688

= 1 / 688

= 1

So, Greatest Common Divisor of 981, 138, 638, 688 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 738, 278, 592, 763
• GCD of 566, 702, 204, 677
• GCD of 741, 291, 616, 829
• GCD of 182, 673, 231, 416
• GCD of 554, 688, 365, 449

Given numbers are 981, 138, 638, 688
The greatest common divisor of numbers 981, 138, 638, 688 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 981, 138, 638, 688 is 1.

1. What is the GCD of 981, 138, 638, 688?

GCD of given numbers 981, 138, 638, 688 is 1

2. How to calculate the greatest common divisor of 981, 138, 638, 688?

We can find the highest common divisor of 981, 138, 638, 688 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 981, 138, 638, 688 i.e 1.

3. How can I use the GCD of 981, 138, 638, 688Calculator?

Out the numbers 981, 138, 638, 688 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.