GCD of 643, 124, 220, 688 Calculator

Given Input numbers are 643, 124, 220, 688

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

Divisors of 643 :

The positive integer divisors of 643 that completely divides 643 are.

1, 643

Divisors of 124 :

The positive integer divisors of 124 that completely divides 124 are.

1, 2, 4, 31, 62, 124

Divisors of 220 :

The positive integer divisors of 220 that completely divides 220 are.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220

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 (643, 124, 220, 688) = 1.

Given numbers are 643, 124, 220, 688

The list of prime factors of all numbers are

Prime factors of 643 are 643

Prime factors of 124 are 2 x 2 x 31

Prime factors of 220 are 2 x 2 x 5 x 11

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 643, 124, 220, 688

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

Apply this formula for all numbers.

Step1:

LCM(643, 124) = 79732

GCD(643, 124) = ( 643 x 124 ) / 79732

= 643 / 124

= 643

Step2:

LCM(1, 220) = 220

GCD(1, 220) = ( 1 x 220 ) / 220

= 1 / 220

= 1

Step3:

LCM(1, 688) = 688

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

= 1 / 688

= 1

So, Greatest Common Divisor of 643, 124, 220, 688 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 286, 969, 419, 233
• GCD of 966, 817, 669, 792
• GCD of 331, 168, 667, 391
• GCD of 393, 943, 178, 663
• GCD of 406, 341, 846, 707

Given numbers are 643, 124, 220, 688
The greatest common divisor of numbers 643, 124, 220, 688 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 643, 124, 220, 688 is 1.

1. What is the GCD of 643, 124, 220, 688?

GCD of given numbers 643, 124, 220, 688 is 1

2. How to calculate the greatest common divisor of 643, 124, 220, 688?

We can find the highest common divisor of 643, 124, 220, 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 643, 124, 220, 688 i.e 1.

3. How can I use the GCD of 643, 124, 220, 688Calculator?

Out the numbers 643, 124, 220, 688 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.