LCM of 643, 910, 840, 796
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 643, 910, 840, 796 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 643, 910, 840, 796. So, keep reading to learn more.
Given numbers are 643,910,840,796
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 643,910,840,796 is 1397290440.
Find LCM of 643,910,840,796 with Prime Factorization
| 2 | 643, 910, 840, 796 |
| 2 | 643, 455, 420, 398 |
| 5 | 643, 455, 210, 199 |
| 7 | 643, 91, 42, 199 |
| 643, 13, 6, 199 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 643 x 13 x 6 x 199 = 1397290440
Therefore, the lowest common multiple of 643,910,840,796 is 1397290440.
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.
643 x 910 x 840 x 796 = 391241323200
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.
643 : 1, 643
910 : 1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 130, 182, 455, 910
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
796 : 1, 2, 4, 199, 398, 796
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 643,910,840,796, is 1.
Now, the common factors can be found like this.
643:643
910:2x 5x 7x 13
840:2x 2x 2x 3x 5x 7
796:2x 2x 199
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 5x 7 = 280
Therefore, the value for common factors is 280.
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 = 391241323200/(1x280)
LCM = 391241323200/280
LCM = 1397290440
Thus, we can understand that the LCM of 643,910,840,796 is 1397290440.
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FAQs on LCM of 643, 910, 840, 796
1. What is the LCM of 643, 910, 840, 796?
Answer: LCM of 643, 910, 840, 796 is 1397290440.
2. How to calculate the LCM of 643, 910, 840, 796?
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 643, 910, 840, 796.
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}.