LCM of 615, 690, 471, 391
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 615, 690, 471, 391 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 615, 690, 471, 391. So, keep reading to learn more.
Given numbers are 615,690,471,391
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 615,690,471,391 is 75506010.
Find LCM of 615,690,471,391 with Prime Factorization
| 3 | 615, 690, 471, 391 |
| 5 | 205, 230, 157, 391 |
| 23 | 41, 46, 157, 391 |
| 41, 2, 157, 17 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 23 x 41 x 2 x 157 x 17 = 75506010
Therefore, the lowest common multiple of 615,690,471,391 is 75506010.
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.
615 x 690 x 471 x 391 = 78148720350
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.
615 : 1, 3, 5, 15, 41, 123, 205, 615
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
471 : 1, 3, 157, 471
391 : 1, 17, 23, 391
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 615,690,471,391, is 1.
Now, the common factors can be found like this.
615:3x 5x 41
690:2x 3x 5x 23
471:3x 157
391:17x 23
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 5x 23 = 1035
Therefore, the value for common factors is 1035.
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 = 78148720350/(1x1035)
LCM = 78148720350/1035
LCM = 75506010
Thus, we can understand that the LCM of 615,690,471,391 is 75506010.
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FAQs on LCM of 615, 690, 471, 391
1. What is the LCM of 615, 690, 471, 391?
Answer: LCM of 615, 690, 471, 391 is 75506010.
2. How to calculate the LCM of 615, 690, 471, 391?
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 615, 690, 471, 391.
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}.