LCM of 921, 987, 921, 240
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 921, 987, 921, 240 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 921, 987, 921, 240. So, keep reading to learn more.
Given numbers are 921,987,921,240
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 921,987,921,240 is 24240720.
Find LCM of 921,987,921,240 with Prime Factorization
| 3 | 921, 987, 921, 240 |
| 307 | 307, 329, 307, 80 |
| 1, 329, 1, 80 |
Multiply the prime numbers at the bottom and the left side.
3 x 307 x 1 x 329 x 1 x 80 = 24240720
Therefore, the lowest common multiple of 921,987,921,240 is 24240720.
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.
921 x 987 x 921 x 240 = 200931328080
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.
921 : 1, 3, 307, 921
987 : 1, 3, 7, 21, 47, 141, 329, 987
921 : 1, 3, 307, 921
240 : 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240
3 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 921,987,921,240, is 3.
Now, the common factors can be found like this.
921:3x 307
987:3x 7x 47
921:3x 307
240:2x 2x 2x 2x 3x 5
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 307 = 2763
Therefore, the value for common factors is 2763.
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 = 200931328080/(3x2763)
LCM = 200931328080/8289
LCM = 24240720
Thus, we can understand that the LCM of 921,987,921,240 is 24240720.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 921, 987, 921, 240
1. What is the LCM of 921, 987, 921, 240?
Answer: LCM of 921, 987, 921, 240 is 24240720.
2. How to calculate the LCM of 921, 987, 921, 240?
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 921, 987, 921, 240.
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}.