GCD of 642, 278, 980, 821 Calculator

Given Input numbers are 642, 278, 980, 821

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

Divisors of 642 :

The positive integer divisors of 642 that completely divides 642 are.

1, 2, 3, 6, 107, 214, 321, 642

Divisors of 278 :

The positive integer divisors of 278 that completely divides 278 are.

1, 2, 139, 278

Divisors of 980 :

The positive integer divisors of 980 that completely divides 980 are.

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980

Divisors of 821 :

The positive integer divisors of 821 that completely divides 821 are.

1, 821

GCD of numbers is the greatest common divisor

So, the GCD (642, 278, 980, 821) = 1.

Given numbers are 642, 278, 980, 821

The list of prime factors of all numbers are

Prime factors of 642 are 2 x 3 x 107

Prime factors of 278 are 2 x 139

Prime factors of 980 are 2 x 2 x 5 x 7 x 7

Prime factors of 821 are 821

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

Given numbers are 642, 278, 980, 821

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

Apply this formula for all numbers.

Step1:

LCM(642, 278) = 89238

GCD(642, 278) = ( 642 x 278 ) / 89238

= 642 / 278

= 642

Step2:

LCM(2, 980) = 980

GCD(2, 980) = ( 2 x 980 ) / 980

= 2 / 980

= 2

Step3:

LCM(2, 821) = 1642

GCD(2, 821) = ( 2 x 821 ) / 1642

= 2 / 821

= 2

So, Greatest Common Divisor of 642, 278, 980, 821 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 681, 120, 429, 692
• GCD of 584, 222, 190, 442
• GCD of 981, 637, 882, 867
• GCD of 326, 674, 748, 840
• GCD of 778, 354, 685, 635

Given numbers are 642, 278, 980, 821
The greatest common divisor of numbers 642, 278, 980, 821 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 642, 278, 980, 821 is 1.

1. What is the GCD of 642, 278, 980, 821?

GCD of given numbers 642, 278, 980, 821 is 1

2. How to calculate the greatest common divisor of 642, 278, 980, 821?

We can find the highest common divisor of 642, 278, 980, 821 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 642, 278, 980, 821 i.e 1.

3. How can I use the GCD of 642, 278, 980, 821Calculator?

Out the numbers 642, 278, 980, 821 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.