A:
Positive:
1 x 18080055 x 36160129 x 6234537 x 48865145 x 12469185 x 9773337 x 53651073 x 1685
Negative:
-1 x -1808005-5 x -361601-29 x -62345-37 x -48865-145 x -12469-185 x -9773-337 x -5365-1073 x -1685
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 1,808,005, 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 | 1,808,005 | |
| -1 | -1,808,005 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,808,005.
Example:
1 x 1,808,005 = 1,808,005
and
-1 x -1,808,005 = 1,808,005
Notice both answers equal 1,808,005
With that explanation out of the way, let's continue. Next, we take the number 1,808,005 and divide it by 2:
1,808,005 ÷ 2 = 904,002.5
If the quotient is a whole number, then 2 and 904,002.5 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 | 1,808,005 | |
| -1 | -1,808,005 |
Now, we try dividing 1,808,005 by 3:
1,808,005 ÷ 3 = 602,668.3333
If the quotient is a whole number, then 3 and 602,668.3333 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 | 1,808,005 | |
| -1 | -1,808,005 |
Let's try dividing by 4:
1,808,005 ÷ 4 = 452,001.25
If the quotient is a whole number, then 4 and 452,001.25 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 | 1,808,005 | |
| -1 | 1,808,005 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 37 | 145 | 185 | 337 | 1,073 | 1,685 | 5,365 | 9,773 | 12,469 | 48,865 | 62,345 | 361,601 | 1,808,005 |
| -1 | -5 | -29 | -37 | -145 | -185 | -337 | -1,073 | -1,685 | -5,365 | -9,773 | -12,469 | -48,865 | -62,345 | -361,601 | -1,808,005 |
Here are some more numbers to try:
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