Given numbers are 821,638,386,421

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

The LCM of 821,638,386,421 is 42560158894.

Find LCM of 821,638,386,421 with Prime Factorization

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

2 x 821 x 319 x 193 x 421 = 42560158894

Therefore, the lowest common multiple of 821,638,386,421 is 42560158894.

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.

821 x 638 x 386 x 421 = 85120317788

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.

821 : 1, 821

638 : 1, 2, 11, 22, 29, 58, 319, 638

386 : 1, 2, 193, 386

421 : 1, 421

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 821,638,386,421, is 1.

Now, the common factors can be found like this.

821:821

638:2x 11x 29

386:2x 193

421:421

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

2 = 2

Therefore, the value for common factors is 2.

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 = 85120317788/(1x2)

LCM = 85120317788/2

LCM = 42560158894

Thus, we can understand that the LCM of 821,638,386,421 is 42560158894.

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

• LCM of 102, 269, 561, 415
• LCM of 145, 449, 130, 285
• LCM of 355, 191, 673, 345
• LCM of 735, 776, 114, 166
• LCM of 227, 195, 795, 543

1. What is the LCM of 821, 638, 386, 421?

Answer: LCM of 821, 638, 386, 421 is 42560158894.

2. How to calculate the LCM of 821, 638, 386, 421?

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 821, 638, 386, 421.

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}.