A:
Positive:
1 x 1275118855 x 2550237723 x 5543995115 x 1108799409 x 3117652045 x 623532711 x 470359407 x 13555
Negative:
-1 x -127511885-5 x -25502377-23 x -5543995-115 x -1108799-409 x -311765-2045 x -62353-2711 x -47035-9407 x -13555
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 127,511,885, 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 | 127,511,885 | |
| -1 | -127,511,885 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 127,511,885.
Example:
1 x 127,511,885 = 127,511,885
and
-1 x -127,511,885 = 127,511,885
Notice both answers equal 127,511,885
With that explanation out of the way, let's continue. Next, we take the number 127,511,885 and divide it by 2:
127,511,885 ÷ 2 = 63,755,942.5
If the quotient is a whole number, then 2 and 63,755,942.5 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 | 127,511,885 | |
| -1 | -127,511,885 |
Now, we try dividing 127,511,885 by 3:
127,511,885 ÷ 3 = 42,503,961.6667
If the quotient is a whole number, then 3 and 42,503,961.6667 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 | 127,511,885 | |
| -1 | -127,511,885 |
Let's try dividing by 4:
127,511,885 ÷ 4 = 31,877,971.25
If the quotient is a whole number, then 4 and 31,877,971.25 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 | 127,511,885 | |
| -1 | 127,511,885 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 409 | 2,045 | 2,711 | 9,407 | 13,555 | 47,035 | 62,353 | 311,765 | 1,108,799 | 5,543,995 | 25,502,377 | 127,511,885 |
| -1 | -5 | -23 | -115 | -409 | -2,045 | -2,711 | -9,407 | -13,555 | -47,035 | -62,353 | -311,765 | -1,108,799 | -5,543,995 | -25,502,377 | -127,511,885 |
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