A:
Positive:
1 x 131029997 x 187185713 x 100792391 x 143989109 x 120211763 x 171731321 x 99191417 x 9247
Negative:
-1 x -13102999-7 x -1871857-13 x -1007923-91 x -143989-109 x -120211-763 x -17173-1321 x -9919-1417 x -9247
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 13,102,999, 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 | 13,102,999 | |
| -1 | -13,102,999 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,102,999.
Example:
1 x 13,102,999 = 13,102,999
and
-1 x -13,102,999 = 13,102,999
Notice both answers equal 13,102,999
With that explanation out of the way, let's continue. Next, we take the number 13,102,999 and divide it by 2:
13,102,999 ÷ 2 = 6,551,499.5
If the quotient is a whole number, then 2 and 6,551,499.5 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 | 13,102,999 | |
| -1 | -13,102,999 |
Now, we try dividing 13,102,999 by 3:
13,102,999 ÷ 3 = 4,367,666.3333
If the quotient is a whole number, then 3 and 4,367,666.3333 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 | 13,102,999 | |
| -1 | -13,102,999 |
Let's try dividing by 4:
13,102,999 ÷ 4 = 3,275,749.75
If the quotient is a whole number, then 4 and 3,275,749.75 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 | 13,102,999 | |
| -1 | 13,102,999 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 109 | 763 | 1,321 | 1,417 | 9,247 | 9,919 | 17,173 | 120,211 | 143,989 | 1,007,923 | 1,871,857 | 13,102,999 |
| -1 | -7 | -13 | -91 | -109 | -763 | -1,321 | -1,417 | -9,247 | -9,919 | -17,173 | -120,211 | -143,989 | -1,007,923 | -1,871,857 | -13,102,999 |
Here are some more numbers to try:
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