A:
Positive:
1 x 188881455 x 377762931 x 609295155 x 121859233 x 81065523 x 361151165 x 162132615 x 7223
Negative:
-1 x -18888145-5 x -3777629-31 x -609295-155 x -121859-233 x -81065-523 x -36115-1165 x -16213-2615 x -7223
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 18,888,145, 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 | 18,888,145 | |
| -1 | -18,888,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,888,145.
Example:
1 x 18,888,145 = 18,888,145
and
-1 x -18,888,145 = 18,888,145
Notice both answers equal 18,888,145
With that explanation out of the way, let's continue. Next, we take the number 18,888,145 and divide it by 2:
18,888,145 ÷ 2 = 9,444,072.5
If the quotient is a whole number, then 2 and 9,444,072.5 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 | 18,888,145 | |
| -1 | -18,888,145 |
Now, we try dividing 18,888,145 by 3:
18,888,145 ÷ 3 = 6,296,048.3333
If the quotient is a whole number, then 3 and 6,296,048.3333 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 | 18,888,145 | |
| -1 | -18,888,145 |
Let's try dividing by 4:
18,888,145 ÷ 4 = 4,722,036.25
If the quotient is a whole number, then 4 and 4,722,036.25 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 | 18,888,145 | |
| -1 | 18,888,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 233 | 523 | 1,165 | 2,615 | 7,223 | 16,213 | 36,115 | 81,065 | 121,859 | 609,295 | 3,777,629 | 18,888,145 |
| -1 | -5 | -31 | -155 | -233 | -523 | -1,165 | -2,615 | -7,223 | -16,213 | -36,115 | -81,065 | -121,859 | -609,295 | -3,777,629 | -18,888,145 |
Here are some more numbers to try:
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