LCM of 781, 105, 248, 639
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 105, 248, 639 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 781, 105, 248, 639. So, keep reading to learn more.
Given numbers are 781,105,248,639
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,105,248,639 is 61011720.
Find LCM of 781,105,248,639 with Prime Factorization
| 3 | 781, 105, 248, 639 |
| 71 | 781, 35, 248, 213 |
| 11, 35, 248, 3 |
Multiply the prime numbers at the bottom and the left side.
3 x 71 x 11 x 35 x 248 x 3 = 61011720
Therefore, the lowest common multiple of 781,105,248,639 is 61011720.
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.
781 x 105 x 248 x 639 = 12995496360
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.
781 : 1, 11, 71, 781
105 : 1, 3, 5, 7, 15, 21, 35, 105
248 : 1, 2, 4, 8, 31, 62, 124, 248
639 : 1, 3, 9, 71, 213, 639
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,105,248,639, is 1.
Now, the common factors can be found like this.
781:11x 71
105:3x 5x 7
248:2x 2x 2x 31
639:3x 3x 71
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 71 = 213
Therefore, the value for common factors is 213.
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 = 12995496360/(1x213)
LCM = 12995496360/213
LCM = 61011720
Thus, we can understand that the LCM of 781,105,248,639 is 61011720.
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FAQs on LCM of 781, 105, 248, 639
1. What is the LCM of 781, 105, 248, 639?
Answer: LCM of 781, 105, 248, 639 is 61011720.
2. How to calculate the LCM of 781, 105, 248, 639?
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 781, 105, 248, 639.
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}.