LCM of 781, 639, 903, 980
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 639, 903, 980 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, 639, 903, 980. So, keep reading to learn more.
Given numbers are 781,639,903,980
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,639,903,980 is 296202060.
Find LCM of 781,639,903,980 with Prime Factorization
| 3 | 781, 639, 903, 980 |
| 7 | 781, 213, 301, 980 |
| 71 | 781, 213, 43, 140 |
| 11, 3, 43, 140 |
Multiply the prime numbers at the bottom and the left side.
3 x 7 x 71 x 11 x 3 x 43 x 140 = 296202060
Therefore, the lowest common multiple of 781,639,903,980 is 296202060.
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 639 x 903 x 980 = 441637271460
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
639 : 1, 3, 9, 71, 213, 639
903 : 1, 3, 7, 21, 43, 129, 301, 903
980 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,639,903,980, is 1.
Now, the common factors can be found like this.
781:11x 71
639:3x 3x 71
903:3x 7x 43
980:2x 2x 5x 7x 7
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 7x 71 = 1491
Therefore, the value for common factors is 1491.
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 = 441637271460/(1x1491)
LCM = 441637271460/1491
LCM = 296202060
Thus, we can understand that the LCM of 781,639,903,980 is 296202060.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 781, 639, 903, 980
1. What is the LCM of 781, 639, 903, 980?
Answer: LCM of 781, 639, 903, 980 is 296202060.
2. How to calculate the LCM of 781, 639, 903, 980?
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, 639, 903, 980.
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}.