A:
Positive:
1 x 1315415155 x 263083037 x 1879164535 x 375832943 x 3059105215 x 611821301 x 4370151505 x 87403
Negative:
-1 x -131541515-5 x -26308303-7 x -18791645-35 x -3758329-43 x -3059105-215 x -611821-301 x -437015-1505 x -87403
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 131,541,515, 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 | 131,541,515 | |
| -1 | -131,541,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,541,515.
Example:
1 x 131,541,515 = 131,541,515
and
-1 x -131,541,515 = 131,541,515
Notice both answers equal 131,541,515
With that explanation out of the way, let's continue. Next, we take the number 131,541,515 and divide it by 2:
131,541,515 ÷ 2 = 65,770,757.5
If the quotient is a whole number, then 2 and 65,770,757.5 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 | 131,541,515 | |
| -1 | -131,541,515 |
Now, we try dividing 131,541,515 by 3:
131,541,515 ÷ 3 = 43,847,171.6667
If the quotient is a whole number, then 3 and 43,847,171.6667 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 | 131,541,515 | |
| -1 | -131,541,515 |
Let's try dividing by 4:
131,541,515 ÷ 4 = 32,885,378.75
If the quotient is a whole number, then 4 and 32,885,378.75 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 | 131,541,515 | |
| -1 | 131,541,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 43 | 215 | 301 | 1,505 | 87,403 | 437,015 | 611,821 | 3,059,105 | 3,758,329 | 18,791,645 | 26,308,303 | 131,541,515 |
| -1 | -5 | -7 | -35 | -43 | -215 | -301 | -1,505 | -87,403 | -437,015 | -611,821 | -3,059,105 | -3,758,329 | -18,791,645 | -26,308,303 | -131,541,515 |
Here are some more numbers to try:
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