A:
Positive:
1 x 13101320317 x 7706659157 x 834479191 x 685933257 x 5097792669 x 490873247 x 403494369 x 29987
Negative:
-1 x -131013203-17 x -7706659-157 x -834479-191 x -685933-257 x -509779-2669 x -49087-3247 x -40349-4369 x -29987
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 131,013,203, 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 | 131,013,203 | |
| -1 | -131,013,203 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,013,203.
Example:
1 x 131,013,203 = 131,013,203
and
-1 x -131,013,203 = 131,013,203
Notice both answers equal 131,013,203
With that explanation out of the way, let's continue. Next, we take the number 131,013,203 and divide it by 2:
131,013,203 ÷ 2 = 65,506,601.5
If the quotient is a whole number, then 2 and 65,506,601.5 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 | 131,013,203 | |
| -1 | -131,013,203 |
Now, we try dividing 131,013,203 by 3:
131,013,203 ÷ 3 = 43,671,067.6667
If the quotient is a whole number, then 3 and 43,671,067.6667 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 | 131,013,203 | |
| -1 | -131,013,203 |
Let's try dividing by 4:
131,013,203 ÷ 4 = 32,753,300.75
If the quotient is a whole number, then 4 and 32,753,300.75 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 | 131,013,203 | |
| -1 | 131,013,203 |
If you did it right, you will end up with this table:
| 1 | 17 | 157 | 191 | 257 | 2,669 | 3,247 | 4,369 | 29,987 | 40,349 | 49,087 | 509,779 | 685,933 | 834,479 | 7,706,659 | 131,013,203 |
| -1 | -17 | -157 | -191 | -257 | -2,669 | -3,247 | -4,369 | -29,987 | -40,349 | -49,087 | -509,779 | -685,933 | -834,479 | -7,706,659 | -131,013,203 |
Here are some more numbers to try:
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