LCM of 987, 390, 647, 862
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 987, 390, 647, 862 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 987, 390, 647, 862. So, keep reading to learn more.
Given numbers are 987,390,647,862
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 987,390,647,862 is 35780141670.
Find LCM of 987,390,647,862 with Prime Factorization
| 2 | 987, 390, 647, 862 |
| 3 | 987, 195, 647, 431 |
| 329, 65, 647, 431 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 329 x 65 x 647 x 431 = 35780141670
Therefore, the lowest common multiple of 987,390,647,862 is 35780141670.
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.
987 x 390 x 647 x 862 = 214680850020
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.
987 : 1, 3, 7, 21, 47, 141, 329, 987
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
647 : 1, 647
862 : 1, 2, 431, 862
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 987,390,647,862, is 1.
Now, the common factors can be found like this.
987:3x 7x 47
390:2x 3x 5x 13
647:647
862:2x 431
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 = 214680850020/(1x6)
LCM = 214680850020/6
LCM = 35780141670
Thus, we can understand that the LCM of 987,390,647,862 is 35780141670.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 987, 390, 647, 862
1. What is the LCM of 987, 390, 647, 862?
Answer: LCM of 987, 390, 647, 862 is 35780141670.
2. How to calculate the LCM of 987, 390, 647, 862?
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 987, 390, 647, 862.
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}.