LCM of 720, 276, 645, 505
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 720, 276, 645, 505 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, 276, 645, 505. So, keep reading to learn more.
Given numbers are 720,276,645,505
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 720,276,645,505 is 71920080.
Find LCM of 720,276,645,505 with Prime Factorization
| 2 | 720, 276, 645, 505 |
| 2 | 360, 138, 645, 505 |
| 3 | 180, 69, 645, 505 |
| 5 | 60, 23, 215, 505 |
| 12, 23, 43, 101 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 12 x 23 x 43 x 101 = 71920080
Therefore, the lowest common multiple of 720,276,645,505 is 71920080.
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 276 x 645 x 505 = 64728072000
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
276 : 1, 2, 3, 4, 6, 12, 23, 46, 69, 92, 138, 276
645 : 1, 3, 5, 15, 43, 129, 215, 645
505 : 1, 5, 101, 505
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 720,276,645,505, is 1.
Now, the common factors can be found like this.
720:2x 2x 2x 2x 3x 3x 5
276:2x 2x 3x 23
645:3x 5x 43
505:5x 101
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 5 = 900
Therefore, the value for common factors is 900.
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 = 64728072000/(1x900)
LCM = 64728072000/900
LCM = 71920080
Thus, we can understand that the LCM of 720,276,645,505 is 71920080.
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FAQs on LCM of 720, 276, 645, 505
1. What is the LCM of 720, 276, 645, 505?
Answer: LCM of 720, 276, 645, 505 is 71920080.
2. How to calculate the LCM of 720, 276, 645, 505?
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, 276, 645, 505.
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}.