A:
Positive:
1 x 133252217 x 190360313 x 102501791 x 146431127 x 104923889 x 149891153 x 115571651 x 8071
Negative:
-1 x -13325221-7 x -1903603-13 x -1025017-91 x -146431-127 x -104923-889 x -14989-1153 x -11557-1651 x -8071
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 13,325,221, 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 | 13,325,221 | |
| -1 | -13,325,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,325,221.
Example:
1 x 13,325,221 = 13,325,221
and
-1 x -13,325,221 = 13,325,221
Notice both answers equal 13,325,221
With that explanation out of the way, let's continue. Next, we take the number 13,325,221 and divide it by 2:
13,325,221 ÷ 2 = 6,662,610.5
If the quotient is a whole number, then 2 and 6,662,610.5 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 | 13,325,221 | |
| -1 | -13,325,221 |
Now, we try dividing 13,325,221 by 3:
13,325,221 ÷ 3 = 4,441,740.3333
If the quotient is a whole number, then 3 and 4,441,740.3333 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 | 13,325,221 | |
| -1 | -13,325,221 |
Let's try dividing by 4:
13,325,221 ÷ 4 = 3,331,305.25
If the quotient is a whole number, then 4 and 3,331,305.25 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 | 13,325,221 | |
| -1 | 13,325,221 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 127 | 889 | 1,153 | 1,651 | 8,071 | 11,557 | 14,989 | 104,923 | 146,431 | 1,025,017 | 1,903,603 | 13,325,221 |
| -1 | -7 | -13 | -91 | -127 | -889 | -1,153 | -1,651 | -8,071 | -11,557 | -14,989 | -104,923 | -146,431 | -1,025,017 | -1,903,603 | -13,325,221 |
Here are some more numbers to try:
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