A:
Positive:
1 x 402182155 x 804364329 x 138683561 x 659315145 x 277367305 x 1318631769 x 227354547 x 8845
Negative:
-1 x -40218215-5 x -8043643-29 x -1386835-61 x -659315-145 x -277367-305 x -131863-1769 x -22735-4547 x -8845
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 40,218,215, 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 | 40,218,215 | |
| -1 | -40,218,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,218,215.
Example:
1 x 40,218,215 = 40,218,215
and
-1 x -40,218,215 = 40,218,215
Notice both answers equal 40,218,215
With that explanation out of the way, let's continue. Next, we take the number 40,218,215 and divide it by 2:
40,218,215 ÷ 2 = 20,109,107.5
If the quotient is a whole number, then 2 and 20,109,107.5 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 | 40,218,215 | |
| -1 | -40,218,215 |
Now, we try dividing 40,218,215 by 3:
40,218,215 ÷ 3 = 13,406,071.6667
If the quotient is a whole number, then 3 and 13,406,071.6667 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 | 40,218,215 | |
| -1 | -40,218,215 |
Let's try dividing by 4:
40,218,215 ÷ 4 = 10,054,553.75
If the quotient is a whole number, then 4 and 10,054,553.75 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 | 40,218,215 | |
| -1 | 40,218,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 61 | 145 | 305 | 1,769 | 4,547 | 8,845 | 22,735 | 131,863 | 277,367 | 659,315 | 1,386,835 | 8,043,643 | 40,218,215 |
| -1 | -5 | -29 | -61 | -145 | -305 | -1,769 | -4,547 | -8,845 | -22,735 | -131,863 | -277,367 | -659,315 | -1,386,835 | -8,043,643 | -40,218,215 |
Here are some more numbers to try:
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