GCD of 840, 781, 142, 391 Calculator

Given Input numbers are 840, 781, 142, 391

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 781 :

The positive integer divisors of 781 that completely divides 781 are.

1, 11, 71, 781

Divisors of 142 :

The positive integer divisors of 142 that completely divides 142 are.

1, 2, 71, 142

Divisors of 391 :

The positive integer divisors of 391 that completely divides 391 are.

1, 17, 23, 391

GCD of numbers is the greatest common divisor

So, the GCD (840, 781, 142, 391) = 1.

Given numbers are 840, 781, 142, 391

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 781 are 11 x 71

Prime factors of 142 are 2 x 71

Prime factors of 391 are 17 x 23

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

Given numbers are 840, 781, 142, 391

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

Apply this formula for all numbers.

Step1:

LCM(840, 781) = 656040

GCD(840, 781) = ( 840 x 781 ) / 656040

= 840 / 781

= 840

Step2:

LCM(1, 142) = 142

GCD(1, 142) = ( 1 x 142 ) / 142

= 1 / 142

= 1

Step3:

LCM(1, 391) = 391

GCD(1, 391) = ( 1 x 391 ) / 391

= 1 / 391

= 1

So, Greatest Common Divisor of 840, 781, 142, 391 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 632, 361, 803, 321
• GCD of 829, 616, 788, 461
• GCD of 150, 153, 410, 468
• GCD of 154, 408, 401, 783
• GCD of 692, 123, 208, 434

Given numbers are 840, 781, 142, 391
The greatest common divisor of numbers 840, 781, 142, 391 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 840, 781, 142, 391 is 1.

1. What is the GCD of 840, 781, 142, 391?

GCD of given numbers 840, 781, 142, 391 is 1

2. How to calculate the greatest common divisor of 840, 781, 142, 391?

We can find the highest common divisor of 840, 781, 142, 391 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, 781, 142, 391 i.e 1.

3. How can I use the GCD of 840, 781, 142, 391Calculator?

Out the numbers 840, 781, 142, 391 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.