Given numbers are 642,394,389,778,140

The least common multiple of numbers can be find using the prime factorization method or LCM formula.

The LCM of 642,394,389,778,140 is 3443887020.

Find LCM of 642,394,389,778,140 with Prime Factorization

Multiply the prime numbers at the bottom and the left side.

2 x 389 x 321 x 197 x 1 x 1 x 70 = 3443887020

Therefore, the lowest common multiple of 642,394,389,778,140 is 3443887020.

LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}

Firstly, we have to find the product of all the numbers.

642 x 394 x 389 x 778 x 140 = 10717376406240

Then, let us find the GCF of these five numbers. To do so, we have to list down the factors for each number and choose the highest factor that is in all of the lists.

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

394 : 1, 2, 197, 394

389 : 1, 389

778 : 1, 2, 389, 778

140 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 642,394,389,778,140, is 1.

Now, the common factors can be found like this.

642:2x 3x 107

394:2x 197

389:389

778:2x 389

140:2x 2x 5x 7

From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.

2x 2x 2x 389 = 3112

Therefore, the value for common factors is 3112.

Now that we have all the elements of the formula, we can plug them in to calculate the LCM.

LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}

LCM = 10717376406240/(1x3112)

LCM = 10717376406240/3112

LCM = 3443887020

Thus, we can understand that the LCM of 642,394,389,778,140 is 3443887020.

Here are some samples of LCM of two or more Numbers calculations.

• LCM of 501, 155, 953, 724, 988
• LCM of 785, 883, 452, 727, 963
• LCM of 983, 592, 642, 772, 787
• LCM of 104, 245, 841, 346, 734
• LCM of 291, 513, 384, 262, 612

1. What is the LCM of 642, 394, 389, 778, 140?

Answer: LCM of 642, 394, 389, 778, 140 is 3443887020.

2. How to calculate the LCM of 642, 394, 389, 778, 140?

The LCM can be found using two methods. You can either use the LCM formula or the prime factorization method to calculate the LCM of 642, 394, 389, 778, 140.

3. What is the LCM formula?

The LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}.