LCM of 990, 418, 540, 420
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 990, 418, 540, 420 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 990, 418, 540, 420. So, keep reading to learn more.
Given numbers are 990,418,540,420
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 990,418,540,420 is 790020.
Find LCM of 990,418,540,420 with Prime Factorization
| 2 | 990, 418, 540, 420 |
| 2 | 495, 209, 270, 210 |
| 3 | 495, 209, 135, 105 |
| 3 | 165, 209, 45, 35 |
| 5 | 55, 209, 15, 35 |
| 11 | 11, 209, 3, 7 |
| 1, 19, 3, 7 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 3 x 5 x 11 x 1 x 19 x 3 x 7 = 790020
Therefore, the lowest common multiple of 990,418,540,420 is 790020.
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.
990 x 418 x 540 x 420 = 93854376000
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.
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
418 : 1, 2, 11, 19, 22, 38, 209, 418
540 : 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 270, 540
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 990,418,540,420, is 2.
Now, the common factors can be found like this.
990:2x 3x 3x 5x 11
418:2x 11x 19
540:2x 2x 3x 3x 3x 5
420:2x 2x 3x 5x 7
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 2x 3x 3x 3x 5x 5x 11 = 59400
Therefore, the value for common factors is 59400.
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 = 93854376000/(2x59400)
LCM = 93854376000/118800
LCM = 790020
Thus, we can understand that the LCM of 990,418,540,420 is 790020.
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FAQs on LCM of 990, 418, 540, 420
1. What is the LCM of 990, 418, 540, 420?
Answer: LCM of 990, 418, 540, 420 is 790020.
2. How to calculate the LCM of 990, 418, 540, 420?
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 990, 418, 540, 420.
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}.