LCM of 421, 645, 989, 987
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 421, 645, 989, 987 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 421, 645, 989, 987. So, keep reading to learn more.
Given numbers are 421,645,989,987
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 421,645,989,987 is 2054781015.
Find LCM of 421,645,989,987 with Prime Factorization
| 3 | 421, 645, 989, 987 |
| 43 | 421, 215, 989, 329 |
| 421, 5, 23, 329 |
Multiply the prime numbers at the bottom and the left side.
3 x 43 x 421 x 5 x 23 x 329 = 2054781015
Therefore, the lowest common multiple of 421,645,989,987 is 2054781015.
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.
421 x 645 x 989 x 987 = 265066750935
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.
421 : 1, 421
645 : 1, 3, 5, 15, 43, 129, 215, 645
989 : 1, 23, 43, 989
987 : 1, 3, 7, 21, 47, 141, 329, 987
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 421,645,989,987, is 1.
Now, the common factors can be found like this.
421:421
645:3x 5x 43
989:23x 43
987:3x 7x 47
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 43 = 129
Therefore, the value for common factors is 129.
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 = 265066750935/(1x129)
LCM = 265066750935/129
LCM = 2054781015
Thus, we can understand that the LCM of 421,645,989,987 is 2054781015.
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FAQs on LCM of 421, 645, 989, 987
1. What is the LCM of 421, 645, 989, 987?
Answer: LCM of 421, 645, 989, 987 is 2054781015.
2. How to calculate the LCM of 421, 645, 989, 987?
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 421, 645, 989, 987.
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}.