LCM of 688, 987, 845, 140, 220
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 688, 987, 845, 140, 220 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 688, 987, 845, 140, 220. So, keep reading to learn more.
Given numbers are 688,987,845,140,220
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 688,987,845,140,220 is 6311825520.
Find LCM of 688,987,845,140,220 with Prime Factorization
| 2 | 688, 987, 845, 140, 220 |
| 2 | 344, 987, 845, 70, 110 |
| 5 | 172, 987, 845, 35, 55 |
| 7 | 172, 987, 169, 7, 11 |
| 172, 141, 169, 1, 11 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 172 x 141 x 169 x 1 x 11 = 6311825520
Therefore, the lowest common multiple of 688,987,845,140,220 is 6311825520.
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.
688 x 987 x 845 x 140 x 220 = 17673111456000
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.
688 : 1, 2, 4, 8, 16, 43, 86, 172, 344, 688
987 : 1, 3, 7, 21, 47, 141, 329, 987
845 : 1, 5, 13, 65, 169, 845
140 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
220 : 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 688,987,845,140,220, is 1.
Now, the common factors can be found like this.
688:2x 2x 2x 2x 43
987:3x 7x 47
845:5x 13x 13
140:2x 2x 5x 7
220:2x 2x 5x 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 2x 2x 2x 5x 5x 7 = 2800
Therefore, the value for common factors is 2800.
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 = 17673111456000/(1x2800)
LCM = 17673111456000/2800
LCM = 6311825520
Thus, we can understand that the LCM of 688,987,845,140,220 is 6311825520.
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FAQs on LCM of 688, 987, 845, 140, 220
1. What is the LCM of 688, 987, 845, 140, 220?
Answer: LCM of 688, 987, 845, 140, 220 is 6311825520.
2. How to calculate the LCM of 688, 987, 845, 140, 220?
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 688, 987, 845, 140, 220.
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}.