LCM of 391, 642, 369, 842
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 391, 642, 369, 842 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 391, 642, 369, 842. So, keep reading to learn more.
Given numbers are 391,642,369,842
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 391,642,369,842 is 12998672226.
Find LCM of 391,642,369,842 with Prime Factorization
| 2 | 391, 642, 369, 842 |
| 3 | 391, 321, 369, 421 |
| 391, 107, 123, 421 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 391 x 107 x 123 x 421 = 12998672226
Therefore, the lowest common multiple of 391,642,369,842 is 12998672226.
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.
391 x 642 x 369 x 842 = 77992033356
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.
391 : 1, 17, 23, 391
642 : 1, 2, 3, 6, 107, 214, 321, 642
369 : 1, 3, 9, 41, 123, 369
842 : 1, 2, 421, 842
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 391,642,369,842, is 1.
Now, the common factors can be found like this.
391:17x 23
642:2x 3x 107
369:3x 3x 41
842:2x 421
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3 = 6
Therefore, the value for common factors is 6.
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 = 77992033356/(1x6)
LCM = 77992033356/6
LCM = 12998672226
Thus, we can understand that the LCM of 391,642,369,842 is 12998672226.
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FAQs on LCM of 391, 642, 369, 842
1. What is the LCM of 391, 642, 369, 842?
Answer: LCM of 391, 642, 369, 842 is 12998672226.
2. How to calculate the LCM of 391, 642, 369, 842?
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 391, 642, 369, 842.
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}.