LCM of 644, 108, 168, 395
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 644, 108, 168, 395 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 644, 108, 168, 395. So, keep reading to learn more.
Given numbers are 644,108,168,395
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 644,108,168,395 is 13736520.
Find LCM of 644,108,168,395 with Prime Factorization
| 2 | 644, 108, 168, 395 |
| 2 | 322, 54, 84, 395 |
| 3 | 161, 27, 42, 395 |
| 7 | 161, 9, 14, 395 |
| 23, 9, 2, 395 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 7 x 23 x 9 x 2 x 395 = 13736520
Therefore, the lowest common multiple of 644,108,168,395 is 13736520.
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.
644 x 108 x 168 x 395 = 4615470720
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.
644 : 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
108 : 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108
168 : 1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168
395 : 1, 5, 79, 395
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 644,108,168,395, is 1.
Now, the common factors can be found like this.
644:2x 2x 7x 23
108:2x 2x 3x 3x 3
168:2x 2x 2x 3x 7
395:5x 79
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 7 = 336
Therefore, the value for common factors is 336.
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 = 4615470720/(1x336)
LCM = 4615470720/336
LCM = 13736520
Thus, we can understand that the LCM of 644,108,168,395 is 13736520.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 644, 108, 168, 395
1. What is the LCM of 644, 108, 168, 395?
Answer: LCM of 644, 108, 168, 395 is 13736520.
2. How to calculate the LCM of 644, 108, 168, 395?
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 644, 108, 168, 395.
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}.