Given numbers are 990,856,660,220

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

The LCM of 990,856,660,220 is 423720.

Find LCM of 990,856,660,220 with Prime Factorization

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

2 x 2 x 3 x 5 x 11 x 1 x 214 x 3 x 1 = 423720

Therefore, the lowest common multiple of 990,856,660,220 is 423720.

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.

990 x 856 x 660 x 220 = 123048288000

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.

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

856 : 1, 2, 4, 8, 107, 214, 428, 856

660 : 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660

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

2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 990,856,660,220, is 2.

Now, the common factors can be found like this.

990:2x 3x 3x 5x 11

856:2x 2x 2x 107

660:2x 2x 3x 5x 11

220:2x 2x 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.

2x 2x 2x 2x 3x 5x 5x 11x 11 = 145200

Therefore, the value for common factors is 145200.

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 = 123048288000/(2x145200)

LCM = 123048288000/290400

LCM = 423720

Thus, we can understand that the LCM of 990,856,660,220 is 423720.

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

• LCM of 145, 332, 389, 148
• LCM of 699, 918, 795, 604
• LCM of 835, 384, 855, 522
• LCM of 441, 427, 630, 648
• LCM of 897, 219, 875, 475

1. What is the LCM of 990, 856, 660, 220?

Answer: LCM of 990, 856, 660, 220 is 423720.

2. How to calculate the LCM of 990, 856, 660, 220?

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 990, 856, 660, 220.

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}.