LCM of 771, 561, 528, 221
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 771, 561, 528, 221 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, 561, 528, 221. So, keep reading to learn more.
Given numbers are 771,561,528,221
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 771,561,528,221 is 29988816.
Find LCM of 771,561,528,221 with Prime Factorization
| 3 | 771, 561, 528, 221 |
| 11 | 257, 187, 176, 221 |
| 17 | 257, 17, 16, 221 |
| 257, 1, 16, 13 |
Multiply the prime numbers at the bottom and the left side.
3 x 11 x 17 x 257 x 1 x 16 x 13 = 29988816
Therefore, the lowest common multiple of 771,561,528,221 is 29988816.
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 561 x 528 x 221 = 50471177328
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
561 : 1, 3, 11, 17, 33, 51, 187, 561
528 : 1, 2, 3, 4, 6, 8, 11, 12, 16, 22, 24, 33, 44, 48, 66, 88, 132, 176, 264, 528
221 : 1, 13, 17, 221
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 771,561,528,221, is 1.
Now, the common factors can be found like this.
771:3x 257
561:3x 11x 17
528:2x 2x 2x 2x 3x 11
221:13x 17
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 11x 17 = 1683
Therefore, the value for common factors is 1683.
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 = 50471177328/(1x1683)
LCM = 50471177328/1683
LCM = 29988816
Thus, we can understand that the LCM of 771,561,528,221 is 29988816.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 771, 561, 528, 221
1. What is the LCM of 771, 561, 528, 221?
Answer: LCM of 771, 561, 528, 221 is 29988816.
2. How to calculate the LCM of 771, 561, 528, 221?
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, 561, 528, 221.
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}.