A:
Positive:
1 x 6656466055 x 13312932113 x 5120358565 x 10240717719 x 9257953595 x 1851599347 x 7121514243 x 46735
Negative:
-1 x -665646605-5 x -133129321-13 x -51203585-65 x -10240717-719 x -925795-3595 x -185159-9347 x -71215-14243 x -46735
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 665,646,605, 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 | 665,646,605 | |
| -1 | -665,646,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 665,646,605.
Example:
1 x 665,646,605 = 665,646,605
and
-1 x -665,646,605 = 665,646,605
Notice both answers equal 665,646,605
With that explanation out of the way, let's continue. Next, we take the number 665,646,605 and divide it by 2:
665,646,605 ÷ 2 = 332,823,302.5
If the quotient is a whole number, then 2 and 332,823,302.5 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 | 665,646,605 | |
| -1 | -665,646,605 |
Now, we try dividing 665,646,605 by 3:
665,646,605 ÷ 3 = 221,882,201.6667
If the quotient is a whole number, then 3 and 221,882,201.6667 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 | 665,646,605 | |
| -1 | -665,646,605 |
Let's try dividing by 4:
665,646,605 ÷ 4 = 166,411,651.25
If the quotient is a whole number, then 4 and 166,411,651.25 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 | 665,646,605 | |
| -1 | 665,646,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 719 | 3,595 | 9,347 | 14,243 | 46,735 | 71,215 | 185,159 | 925,795 | 10,240,717 | 51,203,585 | 133,129,321 | 665,646,605 |
| -1 | -5 | -13 | -65 | -719 | -3,595 | -9,347 | -14,243 | -46,735 | -71,215 | -185,159 | -925,795 | -10,240,717 | -51,203,585 | -133,129,321 | -665,646,605 |
Here are some more numbers to try:
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