LCM of 40, 21, 54, 90, 321
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 40, 21, 54, 90, 321 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 40, 21, 54, 90, 321. So, keep reading to learn more.
Given numbers are 40,21,54,90,321
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 40,21,54,90,321 is 808920.
Find LCM of 40,21,54,90,321 with Prime Factorization
| 2 | 40, 21, 54, 90, 321 |
| 3 | 20, 21, 27, 45, 321 |
| 3 | 20, 7, 9, 15, 107 |
| 5 | 20, 7, 3, 5, 107 |
| 4, 7, 3, 1, 107 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 5 x 4 x 7 x 3 x 1 x 107 = 808920
Therefore, the lowest common multiple of 40,21,54,90,321 is 808920.
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.
40 x 21 x 54 x 90 x 321 = 1310450400
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.
40 : 1, 2, 4, 5, 8, 10, 20, 40
21 : 1, 3, 7, 21
54 : 1, 2, 3, 6, 9, 18, 27, 54
90 : 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
321 : 1, 3, 107, 321
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 40,21,54,90,321, is 1.
Now, the common factors can be found like this.
40:2x 2x 2x 5
21:3x 7
54:2x 3x 3x 3
90:2x 3x 3x 5
321:3x 107
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 3x 3x 3x 3x 5 = 1620
Therefore, the value for common factors is 1620.
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 = 1310450400/(1x1620)
LCM = 1310450400/1620
LCM = 808920
Thus, we can understand that the LCM of 40,21,54,90,321 is 808920.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 40, 21, 54, 90, 321
1. What is the LCM of 40, 21, 54, 90, 321?
Answer: LCM of 40, 21, 54, 90, 321 is 808920.
2. How to calculate the LCM of 40, 21, 54, 90, 321?
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 40, 21, 54, 90, 321.
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}.