A:
Positive:
1 x 406880817 x 581258323 x 176904749 x 83036979 x 515039161 x 252721457 x 89033553 x 735771127 x 361031817 x 223933199 x 127193871 x 10511
Negative:
-1 x -40688081-7 x -5812583-23 x -1769047-49 x -830369-79 x -515039-161 x -252721-457 x -89033-553 x -73577-1127 x -36103-1817 x -22393-3199 x -12719-3871 x -10511
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 40,688,081, 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 | 40,688,081 | |
| -1 | -40,688,081 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,688,081.
Example:
1 x 40,688,081 = 40,688,081
and
-1 x -40,688,081 = 40,688,081
Notice both answers equal 40,688,081
With that explanation out of the way, let's continue. Next, we take the number 40,688,081 and divide it by 2:
40,688,081 ÷ 2 = 20,344,040.5
If the quotient is a whole number, then 2 and 20,344,040.5 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 | 40,688,081 | |
| -1 | -40,688,081 |
Now, we try dividing 40,688,081 by 3:
40,688,081 ÷ 3 = 13,562,693.6667
If the quotient is a whole number, then 3 and 13,562,693.6667 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 | 40,688,081 | |
| -1 | -40,688,081 |
Let's try dividing by 4:
40,688,081 ÷ 4 = 10,172,020.25
If the quotient is a whole number, then 4 and 10,172,020.25 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 | 40,688,081 | |
| -1 | 40,688,081 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 49 | 79 | 161 | 457 | 553 | 1,127 | 1,817 | 3,199 | 3,871 | 10,511 | 12,719 | 22,393 | 36,103 | 73,577 | 89,033 | 252,721 | 515,039 | 830,369 | 1,769,047 | 5,812,583 | 40,688,081 |
| -1 | -7 | -23 | -49 | -79 | -161 | -457 | -553 | -1,127 | -1,817 | -3,199 | -3,871 | -10,511 | -12,719 | -22,393 | -36,103 | -73,577 | -89,033 | -252,721 | -515,039 | -830,369 | -1,769,047 | -5,812,583 | -40,688,081 |
Here are some more numbers to try:
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