LCM of 255, 391, 621, 392
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 255, 391, 621, 392 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 255, 391, 621, 392. So, keep reading to learn more.
Given numbers are 255,391,621,392
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 255,391,621,392 is 20691720.
Find LCM of 255,391,621,392 with Prime Factorization
| 3 | 255, 391, 621, 392 |
| 17 | 85, 391, 207, 392 |
| 23 | 5, 23, 207, 392 |
| 5, 1, 9, 392 |
Multiply the prime numbers at the bottom and the left side.
3 x 17 x 23 x 5 x 1 x 9 x 392 = 20691720
Therefore, the lowest common multiple of 255,391,621,392 is 20691720.
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.
255 x 391 x 621 x 392 = 24271387560
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.
255 : 1, 3, 5, 15, 17, 51, 85, 255
391 : 1, 17, 23, 391
621 : 1, 3, 9, 23, 27, 69, 207, 621
392 : 1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 255,391,621,392, is 1.
Now, the common factors can be found like this.
255:3x 5x 17
391:17x 23
621:3x 3x 3x 23
392:2x 2x 2x 7x 7
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 17x 23 = 1173
Therefore, the value for common factors is 1173.
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 = 24271387560/(1x1173)
LCM = 24271387560/1173
LCM = 20691720
Thus, we can understand that the LCM of 255,391,621,392 is 20691720.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 255, 391, 621, 392
1. What is the LCM of 255, 391, 621, 392?
Answer: LCM of 255, 391, 621, 392 is 20691720.
2. How to calculate the LCM of 255, 391, 621, 392?
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 255, 391, 621, 392.
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}.