LCM of 385, 840, 786, 646
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 385, 840, 786, 646 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 385, 840, 786, 646. So, keep reading to learn more.
Given numbers are 385,840,786,646
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 385,840,786,646 is 390972120.
Find LCM of 385,840,786,646 with Prime Factorization
| 2 | 385, 840, 786, 646 |
| 3 | 385, 420, 393, 323 |
| 5 | 385, 140, 131, 323 |
| 7 | 77, 28, 131, 323 |
| 11, 4, 131, 323 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 7 x 11 x 4 x 131 x 323 = 390972120
Therefore, the lowest common multiple of 385,840,786,646 is 390972120.
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.
385 x 840 x 786 x 646 = 164208290400
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.
385 : 1, 5, 7, 11, 35, 55, 77, 385
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
786 : 1, 2, 3, 6, 131, 262, 393, 786
646 : 1, 2, 17, 19, 34, 38, 323, 646
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 385,840,786,646, is 1.
Now, the common factors can be found like this.
385:5x 7x 11
840:2x 2x 2x 3x 5x 7
786:2x 3x 131
646:2x 17x 19
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 5x 7 = 420
Therefore, the value for common factors is 420.
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 = 164208290400/(1x420)
LCM = 164208290400/420
LCM = 390972120
Thus, we can understand that the LCM of 385,840,786,646 is 390972120.
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FAQs on LCM of 385, 840, 786, 646
1. What is the LCM of 385, 840, 786, 646?
Answer: LCM of 385, 840, 786, 646 is 390972120.
2. How to calculate the LCM of 385, 840, 786, 646?
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 385, 840, 786, 646.
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}.