LCM of 920, 391, 820, 728
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 920, 391, 820, 728 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 920, 391, 820, 728. So, keep reading to learn more.
Given numbers are 920,391,820,728
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 920,391,820,728 is 58352840.
Find LCM of 920,391,820,728 with Prime Factorization
| 2 | 920, 391, 820, 728 |
| 2 | 460, 391, 410, 364 |
| 2 | 230, 391, 205, 182 |
| 5 | 115, 391, 205, 91 |
| 23 | 23, 391, 41, 91 |
| 1, 17, 41, 91 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 5 x 23 x 1 x 17 x 41 x 91 = 58352840
Therefore, the lowest common multiple of 920,391,820,728 is 58352840.
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.
920 x 391 x 820 x 728 = 214738451200
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.
920 : 1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920
391 : 1, 17, 23, 391
820 : 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820
728 : 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 920,391,820,728, is 1.
Now, the common factors can be found like this.
920:2x 2x 2x 5x 23
391:17x 23
820:2x 2x 5x 41
728:2x 2x 2x 7x 13
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 2x 2x 5x 23 = 3680
Therefore, the value for common factors is 3680.
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 = 214738451200/(1x3680)
LCM = 214738451200/3680
LCM = 58352840
Thus, we can understand that the LCM of 920,391,820,728 is 58352840.
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FAQs on LCM of 920, 391, 820, 728
1. What is the LCM of 920, 391, 820, 728?
Answer: LCM of 920, 391, 820, 728 is 58352840.
2. How to calculate the LCM of 920, 391, 820, 728?
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 920, 391, 820, 728.
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}.