LCM of 816, 794, 861, 420
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 816, 794, 861, 420 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 816, 794, 861, 420. So, keep reading to learn more.
Given numbers are 816,794,861,420
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 816,794,861,420 is 464871120.
Find LCM of 816,794,861,420 with Prime Factorization
| 2 | 816, 794, 861, 420 |
| 2 | 408, 397, 861, 210 |
| 3 | 204, 397, 861, 105 |
| 7 | 68, 397, 287, 35 |
| 68, 397, 41, 5 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 7 x 68 x 397 x 41 x 5 = 464871120
Therefore, the lowest common multiple of 816,794,861,420 is 464871120.
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.
816 x 794 x 861 x 420 = 234295044480
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.
816 : 1, 2, 3, 4, 6, 8, 12, 16, 17, 24, 34, 48, 51, 68, 102, 136, 204, 272, 408, 816
794 : 1, 2, 397, 794
861 : 1, 3, 7, 21, 41, 123, 287, 861
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 816,794,861,420, is 1.
Now, the common factors can be found like this.
816:2x 2x 2x 2x 3x 17
794:2x 397
861:3x 7x 41
420:2x 2x 3x 5x 7
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 3x 7 = 504
Therefore, the value for common factors is 504.
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 = 234295044480/(1x504)
LCM = 234295044480/504
LCM = 464871120
Thus, we can understand that the LCM of 816,794,861,420 is 464871120.
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FAQs on LCM of 816, 794, 861, 420
1. What is the LCM of 816, 794, 861, 420?
Answer: LCM of 816, 794, 861, 420 is 464871120.
2. How to calculate the LCM of 816, 794, 861, 420?
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 816, 794, 861, 420.
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}.