LCM of 989, 969, 438, 391
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 989, 969, 438, 391 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 989, 969, 438, 391. So, keep reading to learn more.
Given numbers are 989,969,438,391
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 989,969,438,391 is 139917786.
Find LCM of 989,969,438,391 with Prime Factorization
| 3 | 989, 969, 438, 391 |
| 17 | 989, 323, 146, 391 |
| 23 | 989, 19, 146, 23 |
| 43, 19, 146, 1 |
Multiply the prime numbers at the bottom and the left side.
3 x 17 x 23 x 43 x 19 x 146 x 1 = 139917786
Therefore, the lowest common multiple of 989,969,438,391 is 139917786.
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.
989 x 969 x 438 x 391 = 164123562978
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.
989 : 1, 23, 43, 989
969 : 1, 3, 17, 19, 51, 57, 323, 969
438 : 1, 2, 3, 6, 73, 146, 219, 438
391 : 1, 17, 23, 391
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 989,969,438,391, is 1.
Now, the common factors can be found like this.
989:23x 43
969:3x 17x 19
438:2x 3x 73
391:17x 23
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 = 164123562978/(1x1173)
LCM = 164123562978/1173
LCM = 139917786
Thus, we can understand that the LCM of 989,969,438,391 is 139917786.
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FAQs on LCM of 989, 969, 438, 391
1. What is the LCM of 989, 969, 438, 391?
Answer: LCM of 989, 969, 438, 391 is 139917786.
2. How to calculate the LCM of 989, 969, 438, 391?
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 989, 969, 438, 391.
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}.