A:
Positive:
1 x 2311515555 x 46230311151 x 1530805211 x 1095505755 x 3061611055 x 2191011451 x 1593057255 x 31861
Negative:
-1 x -231151555-5 x -46230311-151 x -1530805-211 x -1095505-755 x -306161-1055 x -219101-1451 x -159305-7255 x -31861
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 231,151,555, 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 | 231,151,555 | |
| -1 | -231,151,555 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 231,151,555.
Example:
1 x 231,151,555 = 231,151,555
and
-1 x -231,151,555 = 231,151,555
Notice both answers equal 231,151,555
With that explanation out of the way, let's continue. Next, we take the number 231,151,555 and divide it by 2:
231,151,555 ÷ 2 = 115,575,777.5
If the quotient is a whole number, then 2 and 115,575,777.5 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 | 231,151,555 | |
| -1 | -231,151,555 |
Now, we try dividing 231,151,555 by 3:
231,151,555 ÷ 3 = 77,050,518.3333
If the quotient is a whole number, then 3 and 77,050,518.3333 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 | 231,151,555 | |
| -1 | -231,151,555 |
Let's try dividing by 4:
231,151,555 ÷ 4 = 57,787,888.75
If the quotient is a whole number, then 4 and 57,787,888.75 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 | 231,151,555 | |
| -1 | 231,151,555 |
If you did it right, you will end up with this table:
| 1 | 5 | 151 | 211 | 755 | 1,055 | 1,451 | 7,255 | 31,861 | 159,305 | 219,101 | 306,161 | 1,095,505 | 1,530,805 | 46,230,311 | 231,151,555 |
| -1 | -5 | -151 | -211 | -755 | -1,055 | -1,451 | -7,255 | -31,861 | -159,305 | -219,101 | -306,161 | -1,095,505 | -1,530,805 | -46,230,311 | -231,151,555 |
Here are some more numbers to try:
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