LCM of 728, 221, 728, 986
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 728, 221, 728, 986 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, 221, 728, 986. So, keep reading to learn more.
Given numbers are 728,221,728,986
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 728,221,728,986 is 358904.
Find LCM of 728,221,728,986 with Prime Factorization
| 2 | 728, 221, 728, 986 |
| 2 | 364, 221, 364, 493 |
| 2 | 182, 221, 182, 493 |
| 7 | 91, 221, 91, 493 |
| 13 | 13, 221, 13, 493 |
| 17 | 1, 17, 1, 493 |
| 1, 1, 1, 29 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 7 x 13 x 17 x 1 x 1 x 1 x 29 = 358904
Therefore, the lowest common multiple of 728,221,728,986 is 358904.
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 221 x 728 x 986 = 115486693504
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
221 : 1, 13, 17, 221
728 : 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728
986 : 1, 2, 17, 29, 34, 58, 493, 986
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 728,221,728,986, is 1.
Now, the common factors can be found like this.
728:2x 2x 2x 7x 13
221:13x 17
728:2x 2x 2x 7x 13
986:2x 17x 29
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 7x 13x 13x 17 = 321776
Therefore, the value for common factors is 321776.
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 = 115486693504/(1x321776)
LCM = 115486693504/321776
LCM = 358904
Thus, we can understand that the LCM of 728,221,728,986 is 358904.
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FAQs on LCM of 728, 221, 728, 986
1. What is the LCM of 728, 221, 728, 986?
Answer: LCM of 728, 221, 728, 986 is 358904.
2. How to calculate the LCM of 728, 221, 728, 986?
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, 221, 728, 986.
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}.