LCM of 105, 660, 392, 660, 721
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 105, 660, 392, 660, 721 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 105, 660, 392, 660, 721. So, keep reading to learn more.
Given numbers are 105,660,392,660,721
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 105,660,392,660,721 is 6662040.
Find LCM of 105,660,392,660,721 with Prime Factorization
| 2 | 105, 660, 392, 660, 721 |
| 2 | 105, 330, 196, 330, 721 |
| 3 | 105, 165, 98, 165, 721 |
| 5 | 35, 55, 98, 55, 721 |
| 7 | 7, 11, 98, 11, 721 |
| 11 | 1, 11, 14, 11, 103 |
| 1, 1, 14, 1, 103 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 7 x 11 x 1 x 1 x 14 x 1 x 103 = 6662040
Therefore, the lowest common multiple of 105,660,392,660,721 is 6662040.
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.
105 x 660 x 392 x 660 x 721 = 12927022416000
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.
105 : 1, 3, 5, 7, 15, 21, 35, 105
660 : 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660
392 : 1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392
660 : 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660
721 : 1, 7, 103, 721
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 105,660,392,660,721, is 1.
Now, the common factors can be found like this.
105:3x 5x 7
660:2x 2x 3x 5x 11
392:2x 2x 2x 7x 7
660:2x 2x 3x 5x 11
721:7x 103
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 3x 3x 5x 5x 7x 7x 11 = 1940400
Therefore, the value for common factors is 1940400.
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 = 12927022416000/(1x1940400)
LCM = 12927022416000/1940400
LCM = 6662040
Thus, we can understand that the LCM of 105,660,392,660,721 is 6662040.
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FAQs on LCM of 105, 660, 392, 660, 721
1. What is the LCM of 105, 660, 392, 660, 721?
Answer: LCM of 105, 660, 392, 660, 721 is 6662040.
2. How to calculate the LCM of 105, 660, 392, 660, 721?
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 105, 660, 392, 660, 721.
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}.