Given numbers are 815,190,128,778

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

The LCM of 815,190,128,778 is 771029120.

Find LCM of 815,190,128,778 with Prime Factorization

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

2 x 5 x 163 x 19 x 64 x 389 = 771029120

Therefore, the lowest common multiple of 815,190,128,778 is 771029120.

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 190 x 128 x 778 = 15420582400

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

190 : 1, 2, 5, 10, 19, 38, 95, 190

128 : 1, 2, 4, 8, 16, 32, 64, 128

778 : 1, 2, 389, 778

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 815,190,128,778, is 1.

Now, the common factors can be found like this.

815:5x 163

190:2x 5x 19

128:2x 2x 2x 2x 2x 2x 2

778:2x 389

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 5 = 20

Therefore, the value for common factors is 20.

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 = 15420582400/(1x20)

LCM = 15420582400/20

LCM = 771029120

Thus, we can understand that the LCM of 815,190,128,778 is 771029120.

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

• LCM of 725, 761, 806, 546
• LCM of 527, 504, 213, 906
• LCM of 595, 644, 397, 715
• LCM of 775, 920, 405, 431
• LCM of 450, 766, 768, 421

1. What is the LCM of 815, 190, 128, 778?

Answer: LCM of 815, 190, 128, 778 is 771029120.

2. How to calculate the LCM of 815, 190, 128, 778?

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, 190, 128, 778.

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}.