LCM of 742, 972, 240, 821
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 742, 972, 240, 821 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 742, 972, 240, 821. So, keep reading to learn more.
Given numbers are 742,972,240,821
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 742,972,240,821 is 5921249040.
Find LCM of 742,972,240,821 with Prime Factorization
| 2 | 742, 972, 240, 821 |
| 2 | 371, 486, 120, 821 |
| 3 | 371, 243, 60, 821 |
| 371, 81, 20, 821 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 371 x 81 x 20 x 821 = 5921249040
Therefore, the lowest common multiple of 742,972,240,821 is 5921249040.
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.
742 x 972 x 240 x 821 = 142109976960
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.
742 : 1, 2, 7, 14, 53, 106, 371, 742
972 : 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 972
240 : 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240
821 : 1, 821
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 742,972,240,821, is 1.
Now, the common factors can be found like this.
742:2x 7x 53
972:2x 2x 3x 3x 3x 3x 3
240:2x 2x 2x 2x 3x 5
821:821
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 3 = 24
Therefore, the value for common factors is 24.
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 = 142109976960/(1x24)
LCM = 142109976960/24
LCM = 5921249040
Thus, we can understand that the LCM of 742,972,240,821 is 5921249040.
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FAQs on LCM of 742, 972, 240, 821
1. What is the LCM of 742, 972, 240, 821?
Answer: LCM of 742, 972, 240, 821 is 5921249040.
2. How to calculate the LCM of 742, 972, 240, 821?
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 742, 972, 240, 821.
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}.