A:
Positive:
1 x 6643461555 x 13286923111 x 6039510555 x 1207902179 x 8409445395 x 1681889869 x 7644954345 x 152899
Negative:
-1 x -664346155-5 x -132869231-11 x -60395105-55 x -12079021-79 x -8409445-395 x -1681889-869 x -764495-4345 x -152899
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 664,346,155, 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 | 664,346,155 | |
| -1 | -664,346,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 664,346,155.
Example:
1 x 664,346,155 = 664,346,155
and
-1 x -664,346,155 = 664,346,155
Notice both answers equal 664,346,155
With that explanation out of the way, let's continue. Next, we take the number 664,346,155 and divide it by 2:
664,346,155 ÷ 2 = 332,173,077.5
If the quotient is a whole number, then 2 and 332,173,077.5 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 | 664,346,155 | |
| -1 | -664,346,155 |
Now, we try dividing 664,346,155 by 3:
664,346,155 ÷ 3 = 221,448,718.3333
If the quotient is a whole number, then 3 and 221,448,718.3333 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 | 664,346,155 | |
| -1 | -664,346,155 |
Let's try dividing by 4:
664,346,155 ÷ 4 = 166,086,538.75
If the quotient is a whole number, then 4 and 166,086,538.75 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 | 664,346,155 | |
| -1 | 664,346,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 79 | 395 | 869 | 4,345 | 152,899 | 764,495 | 1,681,889 | 8,409,445 | 12,079,021 | 60,395,105 | 132,869,231 | 664,346,155 |
| -1 | -5 | -11 | -55 | -79 | -395 | -869 | -4,345 | -152,899 | -764,495 | -1,681,889 | -8,409,445 | -12,079,021 | -60,395,105 | -132,869,231 | -664,346,155 |
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