LCM of 771, 791, 644, 720
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 771, 791, 644, 720 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 771, 791, 644, 720. So, keep reading to learn more.
Given numbers are 771,791,644,720
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 771,791,644,720 is 3366432720.
Find LCM of 771,791,644,720 with Prime Factorization
| 2 | 771, 791, 644, 720 |
| 2 | 771, 791, 322, 360 |
| 3 | 771, 791, 161, 180 |
| 7 | 257, 791, 161, 60 |
| 257, 113, 23, 60 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 7 x 257 x 113 x 23 x 60 = 3366432720
Therefore, the lowest common multiple of 771,791,644,720 is 3366432720.
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.
771 x 791 x 644 x 720 = 282780348480
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.
771 : 1, 3, 257, 771
791 : 1, 7, 113, 791
644 : 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
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
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 771,791,644,720, is 1.
Now, the common factors can be found like this.
771:3x 257
791:7x 113
644:2x 2x 7x 23
720:2x 2x 2x 2x 3x 3x 5
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 7 = 84
Therefore, the value for common factors is 84.
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 = 282780348480/(1x84)
LCM = 282780348480/84
LCM = 3366432720
Thus, we can understand that the LCM of 771,791,644,720 is 3366432720.
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FAQs on LCM of 771, 791, 644, 720
1. What is the LCM of 771, 791, 644, 720?
Answer: LCM of 771, 791, 644, 720 is 3366432720.
2. How to calculate the LCM of 771, 791, 644, 720?
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 771, 791, 644, 720.
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}.