A:
Positive:
1 x 18079155 x 36158323 x 7860579 x 22885115 x 15721199 x 9085395 x 4577995 x 1817
Negative:
-1 x -1807915-5 x -361583-23 x -78605-79 x -22885-115 x -15721-199 x -9085-395 x -4577-995 x -1817
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 1,807,915, it is easier to work with a table - it's called factoring from the outside in.
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 | 1,807,915 | |
| -1 | -1,807,915 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,807,915.
Example:
1 x 1,807,915 = 1,807,915
and
-1 x -1,807,915 = 1,807,915
Notice both answers equal 1,807,915
With that explanation out of the way, let's continue. Next, we take the number 1,807,915 and divide it by 2:
1,807,915 ÷ 2 = 903,957.5
If the quotient is a whole number, then 2 and 903,957.5 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 | 1,807,915 | |
| -1 | -1,807,915 |
Now, we try dividing 1,807,915 by 3:
1,807,915 ÷ 3 = 602,638.3333
If the quotient is a whole number, then 3 and 602,638.3333 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 | 1,807,915 | |
| -1 | -1,807,915 |
Let's try dividing by 4:
1,807,915 ÷ 4 = 451,978.75
If the quotient is a whole number, then 4 and 451,978.75 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 | 1,807,915 | |
| -1 | 1,807,915 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 79 | 115 | 199 | 395 | 995 | 1,817 | 4,577 | 9,085 | 15,721 | 22,885 | 78,605 | 361,583 | 1,807,915 |
| -1 | -5 | -23 | -79 | -115 | -199 | -395 | -995 | -1,817 | -4,577 | -9,085 | -15,721 | -22,885 | -78,605 | -361,583 | -1,807,915 |
Here are some more numbers to try:
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