A:
Positive:
1 x 13112020117 x 771295343 x 3049307181 x 724421731 x 179371991 x 1323113077 x 426137783 x 16847
Negative:
-1 x -131120201-17 x -7712953-43 x -3049307-181 x -724421-731 x -179371-991 x -132311-3077 x -42613-7783 x -16847
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 131,120,201, 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 | 131,120,201 | |
| -1 | -131,120,201 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,120,201.
Example:
1 x 131,120,201 = 131,120,201
and
-1 x -131,120,201 = 131,120,201
Notice both answers equal 131,120,201
With that explanation out of the way, let's continue. Next, we take the number 131,120,201 and divide it by 2:
131,120,201 ÷ 2 = 65,560,100.5
If the quotient is a whole number, then 2 and 65,560,100.5 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 | 131,120,201 | |
| -1 | -131,120,201 |
Now, we try dividing 131,120,201 by 3:
131,120,201 ÷ 3 = 43,706,733.6667
If the quotient is a whole number, then 3 and 43,706,733.6667 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 | 131,120,201 | |
| -1 | -131,120,201 |
Let's try dividing by 4:
131,120,201 ÷ 4 = 32,780,050.25
If the quotient is a whole number, then 4 and 32,780,050.25 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 | 131,120,201 | |
| -1 | 131,120,201 |
If you did it right, you will end up with this table:
| 1 | 17 | 43 | 181 | 731 | 991 | 3,077 | 7,783 | 16,847 | 42,613 | 132,311 | 179,371 | 724,421 | 3,049,307 | 7,712,953 | 131,120,201 |
| -1 | -17 | -43 | -181 | -731 | -991 | -3,077 | -7,783 | -16,847 | -42,613 | -132,311 | -179,371 | -724,421 | -3,049,307 | -7,712,953 | -131,120,201 |
Here are some more numbers to try:
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