LCM of 989, 420, 194, 688
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 989, 420, 194, 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 989, 420, 194, 688. So, keep reading to learn more.
Given numbers are 989,420,194,688
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 989,420,194,688 is 161167440.
Find LCM of 989,420,194,688 with Prime Factorization
| 2 | 989, 420, 194, 688 |
| 2 | 989, 210, 97, 344 |
| 43 | 989, 105, 97, 172 |
| 23, 105, 97, 4 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 43 x 23 x 105 x 97 x 4 = 161167440
Therefore, the lowest common multiple of 989,420,194,688 is 161167440.
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.
989 x 420 x 194 x 688 = 55441599360
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.
989 : 1, 23, 43, 989
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
194 : 1, 2, 97, 194
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 989,420,194,688, is 1.
Now, the common factors can be found like this.
989:23x 43
420:2x 2x 3x 5x 7
194:2x 97
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.
2x 2x 2x 43 = 344
Therefore, the value for common factors is 344.
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 = 55441599360/(1x344)
LCM = 55441599360/344
LCM = 161167440
Thus, we can understand that the LCM of 989,420,194,688 is 161167440.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 989, 420, 194, 688
1. What is the LCM of 989, 420, 194, 688?
Answer: LCM of 989, 420, 194, 688 is 161167440.
2. How to calculate the LCM of 989, 420, 194, 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 989, 420, 194, 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}.