A:
Positive:
1 x 128492217 x 183560311 x 116811131 x 41449149 x 26222977 x 166873217 x 59213341 x 37681539 x 23839769 x 167091519 x 84592387 x 5383
Negative:
-1 x -12849221-7 x -1835603-11 x -1168111-31 x -414491-49 x -262229-77 x -166873-217 x -59213-341 x -37681-539 x -23839-769 x -16709-1519 x -8459-2387 x -5383
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 12,849,221, 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 | 12,849,221 | |
| -1 | -12,849,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,849,221.
Example:
1 x 12,849,221 = 12,849,221
and
-1 x -12,849,221 = 12,849,221
Notice both answers equal 12,849,221
With that explanation out of the way, let's continue. Next, we take the number 12,849,221 and divide it by 2:
12,849,221 ÷ 2 = 6,424,610.5
If the quotient is a whole number, then 2 and 6,424,610.5 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 | 12,849,221 | |
| -1 | -12,849,221 |
Now, we try dividing 12,849,221 by 3:
12,849,221 ÷ 3 = 4,283,073.6667
If the quotient is a whole number, then 3 and 4,283,073.6667 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 | 12,849,221 | |
| -1 | -12,849,221 |
Let's try dividing by 4:
12,849,221 ÷ 4 = 3,212,305.25
If the quotient is a whole number, then 4 and 3,212,305.25 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 | 12,849,221 | |
| -1 | 12,849,221 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 31 | 49 | 77 | 217 | 341 | 539 | 769 | 1,519 | 2,387 | 5,383 | 8,459 | 16,709 | 23,839 | 37,681 | 59,213 | 166,873 | 262,229 | 414,491 | 1,168,111 | 1,835,603 | 12,849,221 |
| -1 | -7 | -11 | -31 | -49 | -77 | -217 | -341 | -539 | -769 | -1,519 | -2,387 | -5,383 | -8,459 | -16,709 | -23,839 | -37,681 | -59,213 | -166,873 | -262,229 | -414,491 | -1,168,111 | -1,835,603 | -12,849,221 |
Here are some more numbers to try:
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