LCM of 728, 140, 681, 140
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 728, 140, 681, 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 728, 140, 681, 140. So, keep reading to learn more.
Given numbers are 728,140,681,140
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 728,140,681,140 is 2478840.
Find LCM of 728,140,681,140 with Prime Factorization
| 2 | 728, 140, 681, 140 |
| 2 | 364, 70, 681, 70 |
| 5 | 182, 35, 681, 35 |
| 7 | 182, 7, 681, 7 |
| 26, 1, 681, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 26 x 1 x 681 x 1 = 2478840
Therefore, the lowest common multiple of 728,140,681,140 is 2478840.
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.
728 x 140 x 681 x 140 = 9717052800
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.
728 : 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728
140 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
681 : 1, 3, 227, 681
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 728,140,681,140, is 1.
Now, the common factors can be found like this.
728:2x 2x 2x 7x 13
140:2x 2x 5x 7
681:3x 227
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 7x 7 = 3920
Therefore, the value for common factors is 3920.
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 = 9717052800/(1x3920)
LCM = 9717052800/3920
LCM = 2478840
Thus, we can understand that the LCM of 728,140,681,140 is 2478840.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 728, 140, 681, 140
1. What is the LCM of 728, 140, 681, 140?
Answer: LCM of 728, 140, 681, 140 is 2478840.
2. How to calculate the LCM of 728, 140, 681, 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 728, 140, 681, 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}.