Q: What are the factor combinations of the number 1,512,385?

 A:
Positive:   1 x 15123855 x 3024777 x 21605535 x 4321149 x 30865245 x 6173
Negative: -1 x -1512385-5 x -302477-7 x -216055-35 x -43211-49 x -30865-245 x -6173


How do I find the factor combinations of the number 1,512,385?

Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 1,512,385, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.

1 1,512,385
-1 -1,512,385

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,512,385.

Example:
1 x 1,512,385 = 1,512,385
and
-1 x -1,512,385 = 1,512,385
Notice both answers equal 1,512,385

With that explanation out of the way, let's continue. Next, we take the number 1,512,385 and divide it by 2:

1,512,385 ÷ 2 = 756,192.5

If the quotient is a whole number, then 2 and 756,192.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 1,512,385
-1 -1,512,385

Now, we try dividing 1,512,385 by 3:

1,512,385 ÷ 3 = 504,128.3333

If the quotient is a whole number, then 3 and 504,128.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 1,512,385
-1 -1,512,385

Let's try dividing by 4:

1,512,385 ÷ 4 = 378,096.25

If the quotient is a whole number, then 4 and 378,096.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 1,512,385
-1 1,512,385
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

15735492456,17330,86543,211216,055302,4771,512,385
-1-5-7-35-49-245-6,173-30,865-43,211-216,055-302,477-1,512,385

More Examples

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