LCM of 812, 642, 612, 391
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 812, 642, 612, 391 with the LCM of Two or More Numbers Calculator. Here we are teaching you two different methods through which you can calculate the LCM of 812, 642, 612, 391. So, keep reading to learn more.
Given numbers are 812,642,612,391
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 812,642,612,391 is 305744796.
Find LCM of 812,642,612,391 with Prime Factorization
| 2 | 812, 642, 612, 391 |
| 2 | 406, 321, 306, 391 |
| 3 | 203, 321, 153, 391 |
| 17 | 203, 107, 51, 391 |
| 203, 107, 3, 23 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 17 x 203 x 107 x 3 x 23 = 305744796
Therefore, the lowest common multiple of 812,642,612,391 is 305744796.
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.
812 x 642 x 612 x 391 = 124743876768
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.
812 : 1, 2, 4, 7, 14, 28, 29, 58, 116, 203, 406, 812
642 : 1, 2, 3, 6, 107, 214, 321, 642
612 : 1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 51, 68, 102, 153, 204, 306, 612
391 : 1, 17, 23, 391
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 812,642,612,391, is 1.
Now, the common factors can be found like this.
812:2x 2x 7x 29
642:2x 3x 107
612:2x 2x 3x 3x 17
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 2x 2x 3x 17 = 408
Therefore, the value for common factors is 408.
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 = 124743876768/(1x408)
LCM = 124743876768/408
LCM = 305744796
Thus, we can understand that the LCM of 812,642,612,391 is 305744796.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 812, 642, 612, 391
1. What is the LCM of 812, 642, 612, 391?
Answer: LCM of 812, 642, 612, 391 is 305744796.
2. How to calculate the LCM of 812, 642, 612, 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 812, 642, 612, 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}.