GCD of 840, 671, 649, 138 Calculator

Given Input numbers are 840, 671, 649, 138

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

Divisors of 840 :

The positive integer divisors of 840 that completely divides 840 are.

1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840

Divisors of 671 :

The positive integer divisors of 671 that completely divides 671 are.

1, 11, 61, 671

Divisors of 649 :

The positive integer divisors of 649 that completely divides 649 are.

1, 11, 59, 649

Divisors of 138 :

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

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

GCD of numbers is the greatest common divisor

So, the GCD (840, 671, 649, 138) = 1.

Given numbers are 840, 671, 649, 138

The list of prime factors of all numbers are

Prime factors of 840 are 2 x 2 x 2 x 3 x 5 x 7

Prime factors of 671 are 11 x 61

Prime factors of 649 are 11 x 59

Prime factors of 138 are 2 x 3 x 23

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

Given numbers are 840, 671, 649, 138

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

Apply this formula for all numbers.

Step1:

LCM(840, 671) = 563640

GCD(840, 671) = ( 840 x 671 ) / 563640

= 840 / 671

= 840

Step2:

LCM(1, 649) = 649

GCD(1, 649) = ( 1 x 649 ) / 649

= 1 / 649

= 1

Step3:

LCM(1, 138) = 138

GCD(1, 138) = ( 1 x 138 ) / 138

= 1 / 138

= 1

So, Greatest Common Divisor of 840, 671, 649, 138 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 221, 634, 489, 522
• GCD of 934, 484, 443, 718
• GCD of 414, 956, 218, 381
• GCD of 603, 398, 929, 431
• GCD of 331, 534, 308, 661

Given numbers are 840, 671, 649, 138
The greatest common divisor of numbers 840, 671, 649, 138 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 840, 671, 649, 138 is 1.

1. What is the GCD of 840, 671, 649, 138?

GCD of given numbers 840, 671, 649, 138 is 1

2. How to calculate the greatest common divisor of 840, 671, 649, 138?

We can find the highest common divisor of 840, 671, 649, 138 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 840, 671, 649, 138 i.e 1.

3. How can I use the GCD of 840, 671, 649, 138Calculator?

Out the numbers 840, 671, 649, 138 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.