A:
Positive:
1 x 185005855 x 370011719 x 97371595 x 194743149 x 124165745 x 248331307 x 141552831 x 6535
Negative:
-1 x -18500585-5 x -3700117-19 x -973715-95 x -194743-149 x -124165-745 x -24833-1307 x -14155-2831 x -6535
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 18,500,585, 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 | 18,500,585 | |
| -1 | -18,500,585 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,500,585.
Example:
1 x 18,500,585 = 18,500,585
and
-1 x -18,500,585 = 18,500,585
Notice both answers equal 18,500,585
With that explanation out of the way, let's continue. Next, we take the number 18,500,585 and divide it by 2:
18,500,585 ÷ 2 = 9,250,292.5
If the quotient is a whole number, then 2 and 9,250,292.5 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 | 18,500,585 | |
| -1 | -18,500,585 |
Now, we try dividing 18,500,585 by 3:
18,500,585 ÷ 3 = 6,166,861.6667
If the quotient is a whole number, then 3 and 6,166,861.6667 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 | 18,500,585 | |
| -1 | -18,500,585 |
Let's try dividing by 4:
18,500,585 ÷ 4 = 4,625,146.25
If the quotient is a whole number, then 4 and 4,625,146.25 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 | 18,500,585 | |
| -1 | 18,500,585 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 149 | 745 | 1,307 | 2,831 | 6,535 | 14,155 | 24,833 | 124,165 | 194,743 | 973,715 | 3,700,117 | 18,500,585 |
| -1 | -5 | -19 | -95 | -149 | -745 | -1,307 | -2,831 | -6,535 | -14,155 | -24,833 | -124,165 | -194,743 | -973,715 | -3,700,117 | -18,500,585 |
Here are some more numbers to try:
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