LCM of 720, 921, 705, 465
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 720, 921, 705, 465 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 720, 921, 705, 465. So, keep reading to learn more.
Given numbers are 720,921,705,465
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 720,921,705,465 is 322055280.
Find LCM of 720,921,705,465 with Prime Factorization
| 3 | 720, 921, 705, 465 |
| 5 | 240, 307, 235, 155 |
| 48, 307, 47, 31 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 48 x 307 x 47 x 31 = 322055280
Therefore, the lowest common multiple of 720,921,705,465 is 322055280.
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.
720 x 921 x 705 x 465 = 217387314000
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.
720 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
921 : 1, 3, 307, 921
705 : 1, 3, 5, 15, 47, 141, 235, 705
465 : 1, 3, 5, 15, 31, 93, 155, 465
3 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 720,921,705,465, is 3.
Now, the common factors can be found like this.
720:2x 2x 2x 2x 3x 3x 5
921:3x 307
705:3x 5x 47
465:3x 5x 31
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 5x 5 = 225
Therefore, the value for common factors is 225.
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 = 217387314000/(3x225)
LCM = 217387314000/675
LCM = 322055280
Thus, we can understand that the LCM of 720,921,705,465 is 322055280.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 720, 921, 705, 465
1. What is the LCM of 720, 921, 705, 465?
Answer: LCM of 720, 921, 705, 465 is 322055280.
2. How to calculate the LCM of 720, 921, 705, 465?
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 720, 921, 705, 465.
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}.