LCM of 720, 780, 856, 220
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 720, 780, 856, 220 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, 780, 856, 220. So, keep reading to learn more.
Given numbers are 720,780,856,220
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 720,780,856,220 is 11016720.
Find LCM of 720,780,856,220 with Prime Factorization
| 2 | 720, 780, 856, 220 |
| 2 | 360, 390, 428, 110 |
| 2 | 180, 195, 214, 55 |
| 3 | 90, 195, 107, 55 |
| 5 | 30, 65, 107, 55 |
| 6, 13, 107, 11 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 3 x 5 x 6 x 13 x 107 x 11 = 11016720
Therefore, the lowest common multiple of 720,780,856,220 is 11016720.
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 780 x 856 x 220 = 105760512000
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
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
856 : 1, 2, 4, 8, 107, 214, 428, 856
220 : 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220
4 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 720,780,856,220, is 4.
Now, the common factors can be found like this.
720:2x 2x 2x 2x 3x 3x 5
780:2x 2x 3x 5x 13
856:2x 2x 2x 107
220:2x 2x 5x 11
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 2x 3x 5x 5 = 2400
Therefore, the value for common factors is 2400.
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 = 105760512000/(4x2400)
LCM = 105760512000/9600
LCM = 11016720
Thus, we can understand that the LCM of 720,780,856,220 is 11016720.
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FAQs on LCM of 720, 780, 856, 220
1. What is the LCM of 720, 780, 856, 220?
Answer: LCM of 720, 780, 856, 220 is 11016720.
2. How to calculate the LCM of 720, 780, 856, 220?
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, 780, 856, 220.
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}.