LCM of 391, 345, 288, 691
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 391, 345, 288, 691 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 391, 345, 288, 691. So, keep reading to learn more.
Given numbers are 391,345,288,691
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 391,345,288,691 is 389060640.
Find LCM of 391,345,288,691 with Prime Factorization
| 3 | 391, 345, 288, 691 |
| 23 | 391, 115, 96, 691 |
| 17, 5, 96, 691 |
Multiply the prime numbers at the bottom and the left side.
3 x 23 x 17 x 5 x 96 x 691 = 389060640
Therefore, the lowest common multiple of 391,345,288,691 is 389060640.
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.
391 x 345 x 288 x 691 = 26845184160
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.
391 : 1, 17, 23, 391
345 : 1, 3, 5, 15, 23, 69, 115, 345
288 : 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 144, 288
691 : 1, 691
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 391,345,288,691, is 1.
Now, the common factors can be found like this.
391:17x 23
345:3x 5x 23
288:2x 2x 2x 2x 2x 3x 3
691:691
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 23 = 69
Therefore, the value for common factors is 69.
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 = 26845184160/(1x69)
LCM = 26845184160/69
LCM = 389060640
Thus, we can understand that the LCM of 391,345,288,691 is 389060640.
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FAQs on LCM of 391, 345, 288, 691
1. What is the LCM of 391, 345, 288, 691?
Answer: LCM of 391, 345, 288, 691 is 389060640.
2. How to calculate the LCM of 391, 345, 288, 691?
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 391, 345, 288, 691.
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}.