Given numbers are 643,671,990

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

The LCM of 643,671,990 is 38830770.

Find LCM of 643,671,990 with Prime Factorization

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

11 x 643 x 61 x 90 = 38830770

Therefore, the lowest common multiple of 643,671,990 is 38830770.

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.

643 x 671 x 990 = 427138470

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.

643 : 1, 643

671 : 1, 11, 61, 671

990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 643,671,990, is 1.

Now, the common factors can be found like this.

643:643

671:11x 61

990:2x 3x 3x 5x 11

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

11 = 11

Therefore, the value for common factors is 11.

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 = 427138470/(1x11)

LCM = 427138470/11

LCM = 38830770

Thus, we can understand that the LCM of 643,671,990 is 38830770.

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

• LCM of 672, 100, 814
• LCM of 103, 402, 909
• LCM of 885, 626, 320
• LCM of 309, 389, 292
• LCM of 728, 408, 785

1. What is the LCM of 643, 671, 990?

Answer: LCM of 643, 671, 990 is 38830770.

2. How to calculate the LCM of 643, 671, 990?

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 643, 671, 990.

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}.