A:
Positive:
1 x 130129097 x 185898713 x 100099329 x 44872191 x 142999203 x 64103377 x 345172639 x 4931
Negative:
-1 x -13012909-7 x -1858987-13 x -1000993-29 x -448721-91 x -142999-203 x -64103-377 x -34517-2639 x -4931
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 13,012,909, 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 | 13,012,909 | |
| -1 | -13,012,909 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,012,909.
Example:
1 x 13,012,909 = 13,012,909
and
-1 x -13,012,909 = 13,012,909
Notice both answers equal 13,012,909
With that explanation out of the way, let's continue. Next, we take the number 13,012,909 and divide it by 2:
13,012,909 ÷ 2 = 6,506,454.5
If the quotient is a whole number, then 2 and 6,506,454.5 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 | 13,012,909 | |
| -1 | -13,012,909 |
Now, we try dividing 13,012,909 by 3:
13,012,909 ÷ 3 = 4,337,636.3333
If the quotient is a whole number, then 3 and 4,337,636.3333 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 | 13,012,909 | |
| -1 | -13,012,909 |
Let's try dividing by 4:
13,012,909 ÷ 4 = 3,253,227.25
If the quotient is a whole number, then 4 and 3,253,227.25 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 | 13,012,909 | |
| -1 | 13,012,909 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 29 | 91 | 203 | 377 | 2,639 | 4,931 | 34,517 | 64,103 | 142,999 | 448,721 | 1,000,993 | 1,858,987 | 13,012,909 |
| -1 | -7 | -13 | -29 | -91 | -203 | -377 | -2,639 | -4,931 | -34,517 | -64,103 | -142,999 | -448,721 | -1,000,993 | -1,858,987 | -13,012,909 |
Here are some more numbers to try:
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