LCM of 720, 315, 686, 742
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 720, 315, 686, 742 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 720, 315, 686, 742. So, keep reading to learn more.
Given numbers are 720,315,686,742
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 720,315,686,742 is 13088880.
Find LCM of 720,315,686,742 with Prime Factorization
| 2 | 720, 315, 686, 742 |
| 3 | 360, 315, 343, 371 |
| 3 | 120, 105, 343, 371 |
| 5 | 40, 35, 343, 371 |
| 7 | 8, 7, 343, 371 |
| 8, 1, 49, 53 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 5 x 7 x 8 x 1 x 49 x 53 = 13088880
Therefore, the lowest common multiple of 720,315,686,742 is 13088880.
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.
720 x 315 x 686 x 742 = 115443921600
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.
720 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
315 : 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315
686 : 1, 2, 7, 14, 49, 98, 343, 686
742 : 1, 2, 7, 14, 53, 106, 371, 742
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 720,315,686,742, is 1.
Now, the common factors can be found like this.
720:2x 2x 2x 2x 3x 3x 5
315:3x 3x 5x 7
686:2x 7x 7x 7
742:2x 7x 53
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 3x 3x 5x 7x 7 = 8820
Therefore, the value for common factors is 8820.
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 = 115443921600/(1x8820)
LCM = 115443921600/8820
LCM = 13088880
Thus, we can understand that the LCM of 720,315,686,742 is 13088880.
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FAQs on LCM of 720, 315, 686, 742
1. What is the LCM of 720, 315, 686, 742?
Answer: LCM of 720, 315, 686, 742 is 13088880.
2. How to calculate the LCM of 720, 315, 686, 742?
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 720, 315, 686, 742.
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}.