A:
Positive:
1 x 131423055 x 262846111 x 119475543 x 30563555 x 238951215 x 61127473 x 277852365 x 5557
Negative:
-1 x -13142305-5 x -2628461-11 x -1194755-43 x -305635-55 x -238951-215 x -61127-473 x -27785-2365 x -5557
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 13,142,305, 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 | 13,142,305 | |
| -1 | -13,142,305 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,142,305.
Example:
1 x 13,142,305 = 13,142,305
and
-1 x -13,142,305 = 13,142,305
Notice both answers equal 13,142,305
With that explanation out of the way, let's continue. Next, we take the number 13,142,305 and divide it by 2:
13,142,305 ÷ 2 = 6,571,152.5
If the quotient is a whole number, then 2 and 6,571,152.5 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 | 13,142,305 | |
| -1 | -13,142,305 |
Now, we try dividing 13,142,305 by 3:
13,142,305 ÷ 3 = 4,380,768.3333
If the quotient is a whole number, then 3 and 4,380,768.3333 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 | 13,142,305 | |
| -1 | -13,142,305 |
Let's try dividing by 4:
13,142,305 ÷ 4 = 3,285,576.25
If the quotient is a whole number, then 4 and 3,285,576.25 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 | 13,142,305 | |
| -1 | 13,142,305 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 43 | 55 | 215 | 473 | 2,365 | 5,557 | 27,785 | 61,127 | 238,951 | 305,635 | 1,194,755 | 2,628,461 | 13,142,305 |
| -1 | -5 | -11 | -43 | -55 | -215 | -473 | -2,365 | -5,557 | -27,785 | -61,127 | -238,951 | -305,635 | -1,194,755 | -2,628,461 | -13,142,305 |
Here are some more numbers to try:
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