LCM of 287, 720, 748, 140
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 287, 720, 748, 140 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 287, 720, 748, 140. So, keep reading to learn more.
Given numbers are 287,720,748,140
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 287,720,748,140 is 38641680.
Find LCM of 287,720,748,140 with Prime Factorization
| 2 | 287, 720, 748, 140 |
| 2 | 287, 360, 374, 70 |
| 5 | 287, 180, 187, 35 |
| 7 | 287, 36, 187, 7 |
| 41, 36, 187, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 41 x 36 x 187 x 1 = 38641680
Therefore, the lowest common multiple of 287,720,748,140 is 38641680.
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.
287 x 720 x 748 x 140 = 21639340800
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.
287 : 1, 7, 41, 287
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
748 : 1, 2, 4, 11, 17, 22, 34, 44, 68, 187, 374, 748
140 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 287,720,748,140, is 1.
Now, the common factors can be found like this.
287:7x 41
720:2x 2x 2x 2x 3x 3x 5
748:2x 2x 11x 17
140:2x 2x 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 5x 7 = 560
Therefore, the value for common factors is 560.
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 = 21639340800/(1x560)
LCM = 21639340800/560
LCM = 38641680
Thus, we can understand that the LCM of 287,720,748,140 is 38641680.
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FAQs on LCM of 287, 720, 748, 140
1. What is the LCM of 287, 720, 748, 140?
Answer: LCM of 287, 720, 748, 140 is 38641680.
2. How to calculate the LCM of 287, 720, 748, 140?
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 287, 720, 748, 140.
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}.