LCM of 391, 174, 856, 638
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 391, 174, 856, 638 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, 174, 856, 638. So, keep reading to learn more.
Given numbers are 391,174,856,638
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 391,174,856,638 is 320304072.
Find LCM of 391,174,856,638 with Prime Factorization
| 2 | 391, 174, 856, 638 |
| 29 | 391, 87, 428, 319 |
| 391, 3, 428, 11 |
Multiply the prime numbers at the bottom and the left side.
2 x 29 x 391 x 3 x 428 x 11 = 320304072
Therefore, the lowest common multiple of 391,174,856,638 is 320304072.
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 174 x 856 x 638 = 37155272352
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
174 : 1, 2, 3, 6, 29, 58, 87, 174
856 : 1, 2, 4, 8, 107, 214, 428, 856
638 : 1, 2, 11, 22, 29, 58, 319, 638
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 391,174,856,638, is 1.
Now, the common factors can be found like this.
391:17x 23
174:2x 3x 29
856:2x 2x 2x 107
638:2x 11x 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 29 = 116
Therefore, the value for common factors is 116.
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 = 37155272352/(1x116)
LCM = 37155272352/116
LCM = 320304072
Thus, we can understand that the LCM of 391,174,856,638 is 320304072.
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FAQs on LCM of 391, 174, 856, 638
1. What is the LCM of 391, 174, 856, 638?
Answer: LCM of 391, 174, 856, 638 is 320304072.
2. How to calculate the LCM of 391, 174, 856, 638?
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, 174, 856, 638.
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}.