LCM of 972, 420, 310, 805
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 972, 420, 310, 805 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 972, 420, 310, 805. So, keep reading to learn more.
Given numbers are 972,420,310,805
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 972,420,310,805 is 24256260.
Find LCM of 972,420,310,805 with Prime Factorization
| 2 | 972, 420, 310, 805 |
| 2 | 486, 210, 155, 805 |
| 3 | 243, 105, 155, 805 |
| 5 | 81, 35, 155, 805 |
| 7 | 81, 7, 31, 161 |
| 81, 1, 31, 23 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 7 x 81 x 1 x 31 x 23 = 24256260
Therefore, the lowest common multiple of 972,420,310,805 is 24256260.
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.
972 x 420 x 310 x 805 = 101876292000
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.
972 : 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 972
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
310 : 1, 2, 5, 10, 31, 62, 155, 310
805 : 1, 5, 7, 23, 35, 115, 161, 805
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 972,420,310,805, is 1.
Now, the common factors can be found like this.
972:2x 2x 3x 3x 3x 3x 3
420:2x 2x 3x 5x 7
310:2x 5x 31
805:5x 7x 23
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 5x 5x 7 = 4200
Therefore, the value for common factors is 4200.
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 = 101876292000/(1x4200)
LCM = 101876292000/4200
LCM = 24256260
Thus, we can understand that the LCM of 972,420,310,805 is 24256260.
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FAQs on LCM of 972, 420, 310, 805
1. What is the LCM of 972, 420, 310, 805?
Answer: LCM of 972, 420, 310, 805 is 24256260.
2. How to calculate the LCM of 972, 420, 310, 805?
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 972, 420, 310, 805.
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}.