LCM of 831, 780, 840, 700
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 831, 780, 840, 700 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 831, 780, 840, 700. So, keep reading to learn more.
Given numbers are 831,780,840,700
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 831,780,840,700 is 15124200.
Find LCM of 831,780,840,700 with Prime Factorization
| 2 | 831, 780, 840, 700 |
| 2 | 831, 390, 420, 350 |
| 3 | 831, 195, 210, 175 |
| 5 | 277, 65, 70, 175 |
| 7 | 277, 13, 14, 35 |
| 277, 13, 2, 5 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 7 x 277 x 13 x 2 x 5 = 15124200
Therefore, the lowest common multiple of 831,780,840,700 is 15124200.
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.
831 x 780 x 840 x 700 = 381129840000
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.
831 : 1, 3, 277, 831
780 : 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
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
700 : 1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 140, 175, 350, 700
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 831,780,840,700, is 1.
Now, the common factors can be found like this.
831:3x 277
780:2x 2x 3x 5x 13
840:2x 2x 2x 3x 5x 7
700:2x 2x 5x 5x 7
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 3x 3x 5x 5x 7 = 25200
Therefore, the value for common factors is 25200.
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 = 381129840000/(1x25200)
LCM = 381129840000/25200
LCM = 15124200
Thus, we can understand that the LCM of 831,780,840,700 is 15124200.
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FAQs on LCM of 831, 780, 840, 700
1. What is the LCM of 831, 780, 840, 700?
Answer: LCM of 831, 780, 840, 700 is 15124200.
2. How to calculate the LCM of 831, 780, 840, 700?
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 831, 780, 840, 700.
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}.