LCM of 878, 838, 840, 728
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 878, 838, 840, 728 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 878, 838, 840, 728. So, keep reading to learn more.
Given numbers are 878,838,840,728
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 878,838,840,728 is 2008635720.
Find LCM of 878,838,840,728 with Prime Factorization
| 2 | 878, 838, 840, 728 |
| 2 | 439, 419, 420, 364 |
| 2 | 439, 419, 210, 182 |
| 7 | 439, 419, 105, 91 |
| 439, 419, 15, 13 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 7 x 439 x 419 x 15 x 13 = 2008635720
Therefore, the lowest common multiple of 878,838,840,728 is 2008635720.
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.
878 x 838 x 840 x 728 = 449934401280
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.
878 : 1, 2, 439, 878
838 : 1, 2, 419, 838
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
728 : 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 878,838,840,728, is 2.
Now, the common factors can be found like this.
878:2x 439
838:2x 419
840:2x 2x 2x 3x 5x 7
728:2x 2x 2x 7x 13
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 7 = 112
Therefore, the value for common factors is 112.
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 = 449934401280/(2x112)
LCM = 449934401280/224
LCM = 2008635720
Thus, we can understand that the LCM of 878,838,840,728 is 2008635720.
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FAQs on LCM of 878, 838, 840, 728
1. What is the LCM of 878, 838, 840, 728?
Answer: LCM of 878, 838, 840, 728 is 2008635720.
2. How to calculate the LCM of 878, 838, 840, 728?
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 878, 838, 840, 728.
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}.