LCM of 321, 286, 845, 640
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 321, 286, 845, 640 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 321, 286, 845, 640. So, keep reading to learn more.
Given numbers are 321,286,845,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 321,286,845,640 is 381912960.
Find LCM of 321,286,845,640 with Prime Factorization
| 2 | 321, 286, 845, 640 |
| 5 | 321, 143, 845, 320 |
| 13 | 321, 143, 169, 64 |
| 321, 11, 13, 64 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 13 x 321 x 11 x 13 x 64 = 381912960
Therefore, the lowest common multiple of 321,286,845,640 is 381912960.
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.
321 x 286 x 845 x 640 = 49648684800
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.
321 : 1, 3, 107, 321
286 : 1, 2, 11, 13, 22, 26, 143, 286
845 : 1, 5, 13, 65, 169, 845
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 321,286,845,640, is 1.
Now, the common factors can be found like this.
321:3x 107
286:2x 11x 13
845:5x 13x 13
640:2x 2x 2x 2x 2x 2x 2x 5
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 13 = 130
Therefore, the value for common factors is 130.
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 = 49648684800/(1x130)
LCM = 49648684800/130
LCM = 381912960
Thus, we can understand that the LCM of 321,286,845,640 is 381912960.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 321, 286, 845, 640
1. What is the LCM of 321, 286, 845, 640?
Answer: LCM of 321, 286, 845, 640 is 381912960.
2. How to calculate the LCM of 321, 286, 845, 640?
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 321, 286, 845, 640.
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}.