LCM of 726, 840, 646, 688
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 726, 840, 646, 688 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 726, 840, 646, 688. So, keep reading to learn more.
Given numbers are 726,840,646,688
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 726,840,646,688 is 2823355920.
Find LCM of 726,840,646,688 with Prime Factorization
| 2 | 726, 840, 646, 688 |
| 2 | 363, 420, 323, 344 |
| 2 | 363, 210, 323, 172 |
| 3 | 363, 105, 323, 86 |
| 121, 35, 323, 86 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 3 x 121 x 35 x 323 x 86 = 2823355920
Therefore, the lowest common multiple of 726,840,646,688 is 2823355920.
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.
726 x 840 x 646 x 688 = 271042168320
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.
726 : 1, 2, 3, 6, 11, 22, 33, 66, 121, 242, 363, 726
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
688 : 1, 2, 4, 8, 16, 43, 86, 172, 344, 688
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 726,840,646,688, is 2.
Now, the common factors can be found like this.
726:2x 3x 11x 11
840:2x 2x 2x 3x 5x 7
646:2x 17x 19
688:2x 2x 2x 2x 43
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 2x 3 = 48
Therefore, the value for common factors is 48.
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 = 271042168320/(2x48)
LCM = 271042168320/96
LCM = 2823355920
Thus, we can understand that the LCM of 726,840,646,688 is 2823355920.
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FAQs on LCM of 726, 840, 646, 688
1. What is the LCM of 726, 840, 646, 688?
Answer: LCM of 726, 840, 646, 688 is 2823355920.
2. How to calculate the LCM of 726, 840, 646, 688?
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 726, 840, 646, 688.
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}.