LCM of 105, 561, 142, 721
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 105, 561, 142, 721 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 105, 561, 142, 721. So, keep reading to learn more.
Given numbers are 105,561,142,721
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 105,561,142,721 is 287181510.
Find LCM of 105,561,142,721 with Prime Factorization
| 3 | 105, 561, 142, 721 |
| 7 | 35, 187, 142, 721 |
| 5, 187, 142, 103 |
Multiply the prime numbers at the bottom and the left side.
3 x 7 x 5 x 187 x 142 x 103 = 287181510
Therefore, the lowest common multiple of 105,561,142,721 is 287181510.
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.
105 x 561 x 142 x 721 = 6030811710
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.
105 : 1, 3, 5, 7, 15, 21, 35, 105
561 : 1, 3, 11, 17, 33, 51, 187, 561
142 : 1, 2, 71, 142
721 : 1, 7, 103, 721
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 105,561,142,721, is 1.
Now, the common factors can be found like this.
105:3x 5x 7
561:3x 11x 17
142:2x 71
721:7x 103
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 7 = 21
Therefore, the value for common factors is 21.
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 = 6030811710/(1x21)
LCM = 6030811710/21
LCM = 287181510
Thus, we can understand that the LCM of 105,561,142,721 is 287181510.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 105, 561, 142, 721
1. What is the LCM of 105, 561, 142, 721?
Answer: LCM of 105, 561, 142, 721 is 287181510.
2. How to calculate the LCM of 105, 561, 142, 721?
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 105, 561, 142, 721.
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}.