LCM of 741, 717, 840, 646
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 741, 717, 840, 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 741, 717, 840, 646. So, keep reading to learn more.
Given numbers are 741,717,840,646
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 741,717,840,646 is 842991240.
Find LCM of 741,717,840,646 with Prime Factorization
| 2 | 741, 717, 840, 646 |
| 3 | 741, 717, 420, 323 |
| 19 | 247, 239, 140, 323 |
| 13, 239, 140, 17 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 19 x 13 x 239 x 140 x 17 = 842991240
Therefore, the lowest common multiple of 741,717,840,646 is 842991240.
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.
741 x 717 x 840 x 646 = 288303004080
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.
741 : 1, 3, 13, 19, 39, 57, 247, 741
717 : 1, 3, 239, 717
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
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 741,717,840,646, is 1.
Now, the common factors can be found like this.
741:3x 13x 19
717:3x 239
840:2x 2x 2x 3x 5x 7
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 3x 3x 19 = 342
Therefore, the value for common factors is 342.
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 = 288303004080/(1x342)
LCM = 288303004080/342
LCM = 842991240
Thus, we can understand that the LCM of 741,717,840,646 is 842991240.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 741, 717, 840, 646
1. What is the LCM of 741, 717, 840, 646?
Answer: LCM of 741, 717, 840, 646 is 842991240.
2. How to calculate the LCM of 741, 717, 840, 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 741, 717, 840, 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}.