LCM of 784, 840, 493, 805
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 784, 840, 493, 805 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 784, 840, 493, 805. So, keep reading to learn more.
Given numbers are 784,840,493,805
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 784,840,493,805 is 133346640.
Find LCM of 784,840,493,805 with Prime Factorization
| 2 | 784, 840, 493, 805 |
| 2 | 392, 420, 493, 805 |
| 2 | 196, 210, 493, 805 |
| 5 | 98, 105, 493, 805 |
| 7 | 98, 21, 493, 161 |
| 14, 3, 493, 23 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 5 x 7 x 14 x 3 x 493 x 23 = 133346640
Therefore, the lowest common multiple of 784,840,493,805 is 133346640.
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.
784 x 840 x 493 x 805 = 261359414400
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.
784 : 1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784
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
493 : 1, 17, 29, 493
805 : 1, 5, 7, 23, 35, 115, 161, 805
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 784,840,493,805, is 1.
Now, the common factors can be found like this.
784:2x 2x 2x 2x 7x 7
840:2x 2x 2x 3x 5x 7
493:17x 29
805:5x 7x 23
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 5x 7x 7 = 1960
Therefore, the value for common factors is 1960.
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 = 261359414400/(1x1960)
LCM = 261359414400/1960
LCM = 133346640
Thus, we can understand that the LCM of 784,840,493,805 is 133346640.
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FAQs on LCM of 784, 840, 493, 805
1. What is the LCM of 784, 840, 493, 805?
Answer: LCM of 784, 840, 493, 805 is 133346640.
2. How to calculate the LCM of 784, 840, 493, 805?
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 784, 840, 493, 805.
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}.