Given numbers are 815,40,645

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

The LCM of 815,40,645 is 841080.

Find LCM of 815,40,645 with Prime Factorization

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

5 x 163 x 8 x 129 = 841080

Therefore, the lowest common multiple of 815,40,645 is 841080.

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.

815 x 40 x 645 = 21027000

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.

815 : 1, 5, 163, 815

40 : 1, 2, 4, 5, 8, 10, 20, 40

645 : 1, 3, 5, 15, 43, 129, 215, 645

5 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 815,40,645, is 5.

Now, the common factors can be found like this.

815:5x 163

40:2x 2x 2x 5

645:3x 5x 43

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

5 = 5

Therefore, the value for common factors is 5.

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 = 21027000/(5x5)

LCM = 21027000/25

LCM = 841080

Thus, we can understand that the LCM of 815,40,645 is 841080.

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

• LCM of 354, 76, 809
• LCM of 560, 10, 463
• LCM of 393, 71, 873
• LCM of 517, 58, 615
• LCM of 157, 11, 235

1. What is the LCM of 815, 40, 645?

Answer: LCM of 815, 40, 645 is 841080.

2. How to calculate the LCM of 815, 40, 645?

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 815, 40, 645.

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}.