A:
Positive:
1 x 132173155 x 264346331 x 426365155 x 85273269 x 49135317 x 416951345 x 98271585 x 8339
Negative:
-1 x -13217315-5 x -2643463-31 x -426365-155 x -85273-269 x -49135-317 x -41695-1345 x -9827-1585 x -8339
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 13,217,315, 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 | 13,217,315 | |
| -1 | -13,217,315 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,217,315.
Example:
1 x 13,217,315 = 13,217,315
and
-1 x -13,217,315 = 13,217,315
Notice both answers equal 13,217,315
With that explanation out of the way, let's continue. Next, we take the number 13,217,315 and divide it by 2:
13,217,315 ÷ 2 = 6,608,657.5
If the quotient is a whole number, then 2 and 6,608,657.5 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 | 13,217,315 | |
| -1 | -13,217,315 |
Now, we try dividing 13,217,315 by 3:
13,217,315 ÷ 3 = 4,405,771.6667
If the quotient is a whole number, then 3 and 4,405,771.6667 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 | 13,217,315 | |
| -1 | -13,217,315 |
Let's try dividing by 4:
13,217,315 ÷ 4 = 3,304,328.75
If the quotient is a whole number, then 4 and 3,304,328.75 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 | 13,217,315 | |
| -1 | 13,217,315 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 269 | 317 | 1,345 | 1,585 | 8,339 | 9,827 | 41,695 | 49,135 | 85,273 | 426,365 | 2,643,463 | 13,217,315 |
| -1 | -5 | -31 | -155 | -269 | -317 | -1,345 | -1,585 | -8,339 | -9,827 | -41,695 | -49,135 | -85,273 | -426,365 | -2,643,463 | -13,217,315 |
Here are some more numbers to try:
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