A:
Positive:
1 x 400320055 x 800640113 x 307938531 x 129135565 x 615877155 x 258271403 x 993352015 x 19867
Negative:
-1 x -40032005-5 x -8006401-13 x -3079385-31 x -1291355-65 x -615877-155 x -258271-403 x -99335-2015 x -19867
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 40,032,005, 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 | 40,032,005 | |
| -1 | -40,032,005 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,032,005.
Example:
1 x 40,032,005 = 40,032,005
and
-1 x -40,032,005 = 40,032,005
Notice both answers equal 40,032,005
With that explanation out of the way, let's continue. Next, we take the number 40,032,005 and divide it by 2:
40,032,005 ÷ 2 = 20,016,002.5
If the quotient is a whole number, then 2 and 20,016,002.5 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 | 40,032,005 | |
| -1 | -40,032,005 |
Now, we try dividing 40,032,005 by 3:
40,032,005 ÷ 3 = 13,344,001.6667
If the quotient is a whole number, then 3 and 13,344,001.6667 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 | 40,032,005 | |
| -1 | -40,032,005 |
Let's try dividing by 4:
40,032,005 ÷ 4 = 10,008,001.25
If the quotient is a whole number, then 4 and 10,008,001.25 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 | 40,032,005 | |
| -1 | 40,032,005 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 31 | 65 | 155 | 403 | 2,015 | 19,867 | 99,335 | 258,271 | 615,877 | 1,291,355 | 3,079,385 | 8,006,401 | 40,032,005 |
| -1 | -5 | -13 | -31 | -65 | -155 | -403 | -2,015 | -19,867 | -99,335 | -258,271 | -615,877 | -1,291,355 | -3,079,385 | -8,006,401 | -40,032,005 |
Here are some more numbers to try:
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