LCM of 661, 755, 645, 688
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 661, 755, 645, 688 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 661, 755, 645, 688. So, keep reading to learn more.
Given numbers are 661,755,645,688
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 661,755,645,688 is 1030049520.
Find LCM of 661,755,645,688 with Prime Factorization
| 5 | 661, 755, 645, 688 |
| 43 | 661, 151, 129, 688 |
| 661, 151, 3, 16 |
Multiply the prime numbers at the bottom and the left side.
5 x 43 x 661 x 151 x 3 x 16 = 1030049520
Therefore, the lowest common multiple of 661,755,645,688 is 1030049520.
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.
661 x 755 x 645 x 688 = 221460646800
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.
661 : 1, 661
755 : 1, 5, 151, 755
645 : 1, 3, 5, 15, 43, 129, 215, 645
688 : 1, 2, 4, 8, 16, 43, 86, 172, 344, 688
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 661,755,645,688, is 1.
Now, the common factors can be found like this.
661:661
755:5x 151
645:3x 5x 43
688:2x 2x 2x 2x 43
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
5x 43 = 215
Therefore, the value for common factors is 215.
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 = 221460646800/(1x215)
LCM = 221460646800/215
LCM = 1030049520
Thus, we can understand that the LCM of 661,755,645,688 is 1030049520.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 661, 755, 645, 688
1. What is the LCM of 661, 755, 645, 688?
Answer: LCM of 661, 755, 645, 688 is 1030049520.
2. How to calculate the LCM of 661, 755, 645, 688?
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 661, 755, 645, 688.
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}.