A:
Positive:
1 x 66554055711 x 6050368753 x 12557369349 x 1906993583 x 11415793271 x 2034673839 x 17336318497 x 35981
Negative:
-1 x -665540557-11 x -60503687-53 x -12557369-349 x -1906993-583 x -1141579-3271 x -203467-3839 x -173363-18497 x -35981
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 665,540,557, 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 | 665,540,557 | |
| -1 | -665,540,557 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 665,540,557.
Example:
1 x 665,540,557 = 665,540,557
and
-1 x -665,540,557 = 665,540,557
Notice both answers equal 665,540,557
With that explanation out of the way, let's continue. Next, we take the number 665,540,557 and divide it by 2:
665,540,557 ÷ 2 = 332,770,278.5
If the quotient is a whole number, then 2 and 332,770,278.5 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 | 665,540,557 | |
| -1 | -665,540,557 |
Now, we try dividing 665,540,557 by 3:
665,540,557 ÷ 3 = 221,846,852.3333
If the quotient is a whole number, then 3 and 221,846,852.3333 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 | 665,540,557 | |
| -1 | -665,540,557 |
Let's try dividing by 4:
665,540,557 ÷ 4 = 166,385,139.25
If the quotient is a whole number, then 4 and 166,385,139.25 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 | 665,540,557 | |
| -1 | 665,540,557 |
If you did it right, you will end up with this table:
| 1 | 11 | 53 | 349 | 583 | 3,271 | 3,839 | 18,497 | 35,981 | 173,363 | 203,467 | 1,141,579 | 1,906,993 | 12,557,369 | 60,503,687 | 665,540,557 |
| -1 | -11 | -53 | -349 | -583 | -3,271 | -3,839 | -18,497 | -35,981 | -173,363 | -203,467 | -1,141,579 | -1,906,993 | -12,557,369 | -60,503,687 | -665,540,557 |
Here are some more numbers to try:
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