LCM of 398, 161, 138, 990
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 398, 161, 138, 990 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 398, 161, 138, 990. So, keep reading to learn more.
Given numbers are 398,161,138,990
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 398,161,138,990 is 31718610.
Find LCM of 398,161,138,990 with Prime Factorization
| 2 | 398, 161, 138, 990 |
| 3 | 199, 161, 69, 495 |
| 23 | 199, 161, 23, 165 |
| 199, 7, 1, 165 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 23 x 199 x 7 x 1 x 165 = 31718610
Therefore, the lowest common multiple of 398,161,138,990 is 31718610.
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.
398 x 161 x 138 x 990 = 8754336360
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.
398 : 1, 2, 199, 398
161 : 1, 7, 23, 161
138 : 1, 2, 3, 6, 23, 46, 69, 138
990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 398,161,138,990, is 1.
Now, the common factors can be found like this.
398:2x 199
161:7x 23
138:2x 3x 23
990:2x 3x 3x 5x 11
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 3x 23 = 276
Therefore, the value for common factors is 276.
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 = 8754336360/(1x276)
LCM = 8754336360/276
LCM = 31718610
Thus, we can understand that the LCM of 398,161,138,990 is 31718610.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 398, 161, 138, 990
1. What is the LCM of 398, 161, 138, 990?
Answer: LCM of 398, 161, 138, 990 is 31718610.
2. How to calculate the LCM of 398, 161, 138, 990?
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 398, 161, 138, 990.
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}.