Given numbers are 642,646,155,391

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

The LCM of 642,646,155,391 is 739259790.

Find LCM of 642,646,155,391 with Prime Factorization

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

2 x 17 x 321 x 19 x 155 x 23 = 739259790

Therefore, the lowest common multiple of 642,646,155,391 is 739259790.

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 646 x 155 x 391 = 25134832860

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

646 : 1, 2, 17, 19, 34, 38, 323, 646

155 : 1, 5, 31, 155

391 : 1, 17, 23, 391

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 642,646,155,391, is 1.

Now, the common factors can be found like this.

642:2x 3x 107

646:2x 17x 19

155:5x 31

391:17x 23

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

2x 17 = 34

Therefore, the value for common factors is 34.

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 = 25134832860/(1x34)

LCM = 25134832860/34

LCM = 739259790

Thus, we can understand that the LCM of 642,646,155,391 is 739259790.

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

• LCM of 432, 413, 982, 447
• LCM of 433, 200, 942, 602
• LCM of 672, 230, 532, 130
• LCM of 995, 191, 218, 637
• LCM of 105, 211, 799, 815

1. What is the LCM of 642, 646, 155, 391?

Answer: LCM of 642, 646, 155, 391 is 739259790.

2. How to calculate the LCM of 642, 646, 155, 391?

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, 646, 155, 391.

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}.