LCM of 781, 978, 869, 649
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 978, 869, 649 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, 978, 869, 649. So, keep reading to learn more.
Given numbers are 781,978,869,649
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,978,869,649 is 3560155698.
Find LCM of 781,978,869,649 with Prime Factorization
| 11 | 781, 978, 869, 649 |
| 71, 978, 79, 59 |
Multiply the prime numbers at the bottom and the left side.
11 x 71 x 978 x 79 x 59 = 3560155698
Therefore, the lowest common multiple of 781,978,869,649 is 3560155698.
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 978 x 869 x 649 = 430778839458
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
978 : 1, 2, 3, 6, 163, 326, 489, 978
869 : 1, 11, 79, 869
649 : 1, 11, 59, 649
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,978,869,649, is 1.
Now, the common factors can be found like this.
781:11x 71
978:2x 3x 163
869:11x 79
649:11x 59
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
11x 11 = 121
Therefore, the value for common factors is 121.
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 = 430778839458/(1x121)
LCM = 430778839458/121
LCM = 3560155698
Thus, we can understand that the LCM of 781,978,869,649 is 3560155698.
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FAQs on LCM of 781, 978, 869, 649
1. What is the LCM of 781, 978, 869, 649?
Answer: LCM of 781, 978, 869, 649 is 3560155698.
2. How to calculate the LCM of 781, 978, 869, 649?
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, 978, 869, 649.
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}.