Given numbers are 391,720,513,217

The least common multiple of numbers can be find using the prime factorization method or LCM formula.

The LCM of 391,720,513,217 is 3482120880.

Find LCM of 391,720,513,217 with Prime Factorization

Multiply the prime numbers at the bottom and the left side.

3 x 3 x 391 x 80 x 57 x 217 = 3482120880

Therefore, the lowest common multiple of 391,720,513,217 is 3482120880.

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.

391 x 720 x 513 x 217 = 31339087920

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.

391 : 1, 17, 23, 391

720 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720

513 : 1, 3, 9, 19, 27, 57, 171, 513

217 : 1, 7, 31, 217

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 391,720,513,217, is 1.

Now, the common factors can be found like this.

391:17x 23

720:2x 2x 2x 2x 3x 3x 5

513:3x 3x 3x 19

217:7x 31

From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.

3x 3 = 9

Therefore, the value for common factors is 9.

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 = 31339087920/(1x9)

LCM = 31339087920/9

LCM = 3482120880

Thus, we can understand that the LCM of 391,720,513,217 is 3482120880.

Here are some samples of LCM of two or more Numbers calculations.

• LCM of 426, 821, 268, 472
• LCM of 305, 946, 359, 336
• LCM of 235, 900, 877, 289
• LCM of 317, 490, 583, 497
• LCM of 798, 105, 708, 657

1. What is the LCM of 391, 720, 513, 217?

Answer: LCM of 391, 720, 513, 217 is 3482120880.

2. How to calculate the LCM of 391, 720, 513, 217?

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 391, 720, 513, 217.

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}.