A:
Positive:
1 x 130131255 x 260262525 x 52052547 x 276875125 x 104105235 x 55375443 x 29375625 x 208211175 x 110752215 x 5875
Negative:
-1 x -13013125-5 x -2602625-25 x -520525-47 x -276875-125 x -104105-235 x -55375-443 x -29375-625 x -20821-1175 x -11075-2215 x -5875
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 13,013,125, 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 | 13,013,125 | |
| -1 | -13,013,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,013,125.
Example:
1 x 13,013,125 = 13,013,125
and
-1 x -13,013,125 = 13,013,125
Notice both answers equal 13,013,125
With that explanation out of the way, let's continue. Next, we take the number 13,013,125 and divide it by 2:
13,013,125 ÷ 2 = 6,506,562.5
If the quotient is a whole number, then 2 and 6,506,562.5 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 | 13,013,125 | |
| -1 | -13,013,125 |
Now, we try dividing 13,013,125 by 3:
13,013,125 ÷ 3 = 4,337,708.3333
If the quotient is a whole number, then 3 and 4,337,708.3333 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 | 13,013,125 | |
| -1 | -13,013,125 |
Let's try dividing by 4:
13,013,125 ÷ 4 = 3,253,281.25
If the quotient is a whole number, then 4 and 3,253,281.25 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 | 13,013,125 | |
| -1 | 13,013,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 47 | 125 | 235 | 443 | 625 | 1,175 | 2,215 | 5,875 | 11,075 | 20,821 | 29,375 | 55,375 | 104,105 | 276,875 | 520,525 | 2,602,625 | 13,013,125 |
| -1 | -5 | -25 | -47 | -125 | -235 | -443 | -625 | -1,175 | -2,215 | -5,875 | -11,075 | -20,821 | -29,375 | -55,375 | -104,105 | -276,875 | -520,525 | -2,602,625 | -13,013,125 |
Here are some more numbers to try:
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