LCM of 871, 618, 390, 642
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 871, 618, 390, 642 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 871, 618, 390, 642. So, keep reading to learn more.
Given numbers are 871,618,390,642
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 871,618,390,642 is 287978730.
Find LCM of 871,618,390,642 with Prime Factorization
| 2 | 871, 618, 390, 642 |
| 3 | 871, 309, 195, 321 |
| 13 | 871, 103, 65, 107 |
| 67, 103, 5, 107 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 13 x 67 x 103 x 5 x 107 = 287978730
Therefore, the lowest common multiple of 871,618,390,642 is 287978730.
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.
871 x 618 x 390 x 642 = 134774045640
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.
871 : 1, 13, 67, 871
618 : 1, 2, 3, 6, 103, 206, 309, 618
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
642 : 1, 2, 3, 6, 107, 214, 321, 642
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 871,618,390,642, is 1.
Now, the common factors can be found like this.
871:13x 67
618:2x 3x 103
390:2x 3x 5x 13
642:2x 3x 107
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 3x 3x 13 = 468
Therefore, the value for common factors is 468.
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 = 134774045640/(1x468)
LCM = 134774045640/468
LCM = 287978730
Thus, we can understand that the LCM of 871,618,390,642 is 287978730.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 871, 618, 390, 642
1. What is the LCM of 871, 618, 390, 642?
Answer: LCM of 871, 618, 390, 642 is 287978730.
2. How to calculate the LCM of 871, 618, 390, 642?
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 871, 618, 390, 642.
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}.