LCM of 756, 711, 978, 720
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 756, 711, 978, 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 756, 711, 978, 720. So, keep reading to learn more.
Given numbers are 756,711,978,720
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 756,711,978,720 is 194700240.
Find LCM of 756,711,978,720 with Prime Factorization
| 2 | 756, 711, 978, 720 |
| 2 | 378, 711, 489, 360 |
| 3 | 189, 711, 489, 180 |
| 3 | 63, 237, 163, 60 |
| 21, 79, 163, 20 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 3 x 21 x 79 x 163 x 20 = 194700240
Therefore, the lowest common multiple of 756,711,978,720 is 194700240.
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.
756 x 711 x 978 x 720 = 378497266560
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.
756 : 1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 84, 108, 126, 189, 252, 378, 756
711 : 1, 3, 9, 79, 237, 711
978 : 1, 2, 3, 6, 163, 326, 489, 978
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
3 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 756,711,978,720, is 3.
Now, the common factors can be found like this.
756:2x 2x 3x 3x 3x 7
711:3x 3x 79
978:2x 3x 163
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 2x 3x 3x 3x 3 = 648
Therefore, the value for common factors is 648.
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 = 378497266560/(3x648)
LCM = 378497266560/1944
LCM = 194700240
Thus, we can understand that the LCM of 756,711,978,720 is 194700240.
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FAQs on LCM of 756, 711, 978, 720
1. What is the LCM of 756, 711, 978, 720?
Answer: LCM of 756, 711, 978, 720 is 194700240.
2. How to calculate the LCM of 756, 711, 978, 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 756, 711, 978, 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}.