LCM of 721, 121, 856, 770
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 721, 121, 856, 770 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 721, 121, 856, 770. So, keep reading to learn more.
Given numbers are 721,121,856,770
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 721,121,856,770 is 373391480.
Find LCM of 721,121,856,770 with Prime Factorization
| 2 | 721, 121, 856, 770 |
| 7 | 721, 121, 428, 385 |
| 11 | 103, 121, 428, 55 |
| 103, 11, 428, 5 |
Multiply the prime numbers at the bottom and the left side.
2 x 7 x 11 x 103 x 11 x 428 x 5 = 373391480
Therefore, the lowest common multiple of 721,121,856,770 is 373391480.
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.
721 x 121 x 856 x 770 = 57502287920
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.
721 : 1, 7, 103, 721
121 : 1, 11, 121
856 : 1, 2, 4, 8, 107, 214, 428, 856
770 : 1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 721,121,856,770, is 1.
Now, the common factors can be found like this.
721:7x 103
121:11x 11
856:2x 2x 2x 107
770:2x 5x 7x 11
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 7x 11 = 154
Therefore, the value for common factors is 154.
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 = 57502287920/(1x154)
LCM = 57502287920/154
LCM = 373391480
Thus, we can understand that the LCM of 721,121,856,770 is 373391480.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 721, 121, 856, 770
1. What is the LCM of 721, 121, 856, 770?
Answer: LCM of 721, 121, 856, 770 is 373391480.
2. How to calculate the LCM of 721, 121, 856, 770?
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 721, 121, 856, 770.
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}.