A:
Positive:
1 x 402152177 x 574503117 x 2365601103 x 390439119 x 337943193 x 208369289 x 139153721 x 557771351 x 297671751 x 229672023 x 198793281 x 12257
Negative:
-1 x -40215217-7 x -5745031-17 x -2365601-103 x -390439-119 x -337943-193 x -208369-289 x -139153-721 x -55777-1351 x -29767-1751 x -22967-2023 x -19879-3281 x -12257
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 40,215,217, 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 | 40,215,217 | |
| -1 | -40,215,217 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,215,217.
Example:
1 x 40,215,217 = 40,215,217
and
-1 x -40,215,217 = 40,215,217
Notice both answers equal 40,215,217
With that explanation out of the way, let's continue. Next, we take the number 40,215,217 and divide it by 2:
40,215,217 ÷ 2 = 20,107,608.5
If the quotient is a whole number, then 2 and 20,107,608.5 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 | 40,215,217 | |
| -1 | -40,215,217 |
Now, we try dividing 40,215,217 by 3:
40,215,217 ÷ 3 = 13,405,072.3333
If the quotient is a whole number, then 3 and 13,405,072.3333 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 | 40,215,217 | |
| -1 | -40,215,217 |
Let's try dividing by 4:
40,215,217 ÷ 4 = 10,053,804.25
If the quotient is a whole number, then 4 and 10,053,804.25 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 | 40,215,217 | |
| -1 | 40,215,217 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 103 | 119 | 193 | 289 | 721 | 1,351 | 1,751 | 2,023 | 3,281 | 12,257 | 19,879 | 22,967 | 29,767 | 55,777 | 139,153 | 208,369 | 337,943 | 390,439 | 2,365,601 | 5,745,031 | 40,215,217 |
| -1 | -7 | -17 | -103 | -119 | -193 | -289 | -721 | -1,351 | -1,751 | -2,023 | -3,281 | -12,257 | -19,879 | -22,967 | -29,767 | -55,777 | -139,153 | -208,369 | -337,943 | -390,439 | -2,365,601 | -5,745,031 | -40,215,217 |
Here are some more numbers to try:
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