A:
Positive:
1 x 18099055 x 36198117 x 10646585 x 21293107 x 16915199 x 9095535 x 3383995 x 1819
Negative:
-1 x -1809905-5 x -361981-17 x -106465-85 x -21293-107 x -16915-199 x -9095-535 x -3383-995 x -1819
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 1,809,905, 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 | 1,809,905 | |
| -1 | -1,809,905 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,809,905.
Example:
1 x 1,809,905 = 1,809,905
and
-1 x -1,809,905 = 1,809,905
Notice both answers equal 1,809,905
With that explanation out of the way, let's continue. Next, we take the number 1,809,905 and divide it by 2:
1,809,905 ÷ 2 = 904,952.5
If the quotient is a whole number, then 2 and 904,952.5 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 | 1,809,905 | |
| -1 | -1,809,905 |
Now, we try dividing 1,809,905 by 3:
1,809,905 ÷ 3 = 603,301.6667
If the quotient is a whole number, then 3 and 603,301.6667 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 | 1,809,905 | |
| -1 | -1,809,905 |
Let's try dividing by 4:
1,809,905 ÷ 4 = 452,476.25
If the quotient is a whole number, then 4 and 452,476.25 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 | 1,809,905 | |
| -1 | 1,809,905 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 107 | 199 | 535 | 995 | 1,819 | 3,383 | 9,095 | 16,915 | 21,293 | 106,465 | 361,981 | 1,809,905 |
| -1 | -5 | -17 | -85 | -107 | -199 | -535 | -995 | -1,819 | -3,383 | -9,095 | -16,915 | -21,293 | -106,465 | -361,981 | -1,809,905 |
Here are some more numbers to try:
Try the factor calculator