LCM of 681, 705, 620, 781, 728
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 681, 705, 620, 781, 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 681, 705, 620, 781, 728. So, keep reading to learn more.
Given numbers are 681,705,620,781,728
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 681,705,620,781,728 is 2820714176280.
Find LCM of 681,705,620,781,728 with Prime Factorization
| 2 | 681, 705, 620, 781, 728 |
| 2 | 681, 705, 310, 781, 364 |
| 3 | 681, 705, 155, 781, 182 |
| 5 | 227, 235, 155, 781, 182 |
| 227, 47, 31, 781, 182 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 227 x 47 x 31 x 781 x 182 = 2820714176280
Therefore, the lowest common multiple of 681,705,620,781,728 is 2820714176280.
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.
681 x 705 x 620 x 781 x 728 = 169242850576800
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.
681 : 1, 3, 227, 681
705 : 1, 3, 5, 15, 47, 141, 235, 705
620 : 1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620
781 : 1, 11, 71, 781
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 681,705,620,781,728, is 1.
Now, the common factors can be found like this.
681:3x 227
705:3x 5x 47
620:2x 2x 5x 31
781:11x 71
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 3x 5 = 60
Therefore, the value for common factors is 60.
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 = 169242850576800/(1x60)
LCM = 169242850576800/60
LCM = 2820714176280
Thus, we can understand that the LCM of 681,705,620,781,728 is 2820714176280.
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FAQs on LCM of 681, 705, 620, 781, 728
1. What is the LCM of 681, 705, 620, 781, 728?
Answer: LCM of 681, 705, 620, 781, 728 is 2820714176280.
2. How to calculate the LCM of 681, 705, 620, 781, 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 681, 705, 620, 781, 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}.