LCM of 221, 661, 697, 861
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 221, 661, 697, 861 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 221, 661, 697, 861. So, keep reading to learn more.
Given numbers are 221,661,697,861
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 221,661,697,861 is 125775741.
Find LCM of 221,661,697,861 with Prime Factorization
| 17 | 221, 661, 697, 861 |
| 41 | 13, 661, 41, 861 |
| 13, 661, 1, 21 |
Multiply the prime numbers at the bottom and the left side.
17 x 41 x 13 x 661 x 1 x 21 = 125775741
Therefore, the lowest common multiple of 221,661,697,861 is 125775741.
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.
221 x 661 x 697 x 861 = 87665691477
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.
221 : 1, 13, 17, 221
661 : 1, 661
697 : 1, 17, 41, 697
861 : 1, 3, 7, 21, 41, 123, 287, 861
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 221,661,697,861, is 1.
Now, the common factors can be found like this.
221:13x 17
661:661
697:17x 41
861:3x 7x 41
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
17x 41 = 697
Therefore, the value for common factors is 697.
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 = 87665691477/(1x697)
LCM = 87665691477/697
LCM = 125775741
Thus, we can understand that the LCM of 221,661,697,861 is 125775741.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 221, 661, 697, 861
1. What is the LCM of 221, 661, 697, 861?
Answer: LCM of 221, 661, 697, 861 is 125775741.
2. How to calculate the LCM of 221, 661, 697, 861?
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 221, 661, 697, 861.
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}.