LCM of 161, 290, 989, 390
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 161, 290, 989, 390 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 161, 290, 989, 390. So, keep reading to learn more.
Given numbers are 161,290,989,390
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 161,290,989,390 is 78299130.
Find LCM of 161,290,989,390 with Prime Factorization
| 2 | 161, 290, 989, 390 |
| 5 | 161, 145, 989, 195 |
| 23 | 161, 29, 989, 39 |
| 7, 29, 43, 39 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 23 x 7 x 29 x 43 x 39 = 78299130
Therefore, the lowest common multiple of 161,290,989,390 is 78299130.
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.
161 x 290 x 989 x 390 = 18008799900
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.
161 : 1, 7, 23, 161
290 : 1, 2, 5, 10, 29, 58, 145, 290
989 : 1, 23, 43, 989
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 161,290,989,390, is 1.
Now, the common factors can be found like this.
161:7x 23
290:2x 5x 29
989:23x 43
390:2x 3x 5x 13
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 23 = 230
Therefore, the value for common factors is 230.
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 = 18008799900/(1x230)
LCM = 18008799900/230
LCM = 78299130
Thus, we can understand that the LCM of 161,290,989,390 is 78299130.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 161, 290, 989, 390
1. What is the LCM of 161, 290, 989, 390?
Answer: LCM of 161, 290, 989, 390 is 78299130.
2. How to calculate the LCM of 161, 290, 989, 390?
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 161, 290, 989, 390.
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}.