Given numbers are 821,420,872,798

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

The LCM of 821,420,872,798 is 1428244440.

Find LCM of 821,420,872,798 with Prime Factorization

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

2 x 2 x 3 x 7 x 821 x 5 x 218 x 19 = 1428244440

Therefore, the lowest common multiple of 821,420,872,798 is 1428244440.

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 420 x 872 x 798 = 239945065920

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

420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420

872 : 1, 2, 4, 8, 109, 218, 436, 872

798 : 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399, 798

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 821,420,872,798, is 1.

Now, the common factors can be found like this.

821:821

420:2x 2x 3x 5x 7

872:2x 2x 2x 109

798:2x 3x 7x 19

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

2x 2x 2x 3x 7 = 168

Therefore, the value for common factors is 168.

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 = 239945065920/(1x168)

LCM = 239945065920/168

LCM = 1428244440

Thus, we can understand that the LCM of 821,420,872,798 is 1428244440.

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

• LCM of 954, 947, 863, 315
• LCM of 423, 917, 262, 991
• LCM of 563, 832, 827, 581
• LCM of 428, 982, 287, 124
• LCM of 347, 179, 199, 814

1. What is the LCM of 821, 420, 872, 798?

Answer: LCM of 821, 420, 872, 798 is 1428244440.

2. How to calculate the LCM of 821, 420, 872, 798?

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, 420, 872, 798.

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}.