A:
Positive:
1 x 6656533155 x 13313066319 x 3503438595 x 7006877361 x 18439151805 x 368783
Negative:
-1 x -665653315-5 x -133130663-19 x -35034385-95 x -7006877-361 x -1843915-1805 x -368783
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 665,653,315, 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 | 665,653,315 | |
| -1 | -665,653,315 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 665,653,315.
Example:
1 x 665,653,315 = 665,653,315
and
-1 x -665,653,315 = 665,653,315
Notice both answers equal 665,653,315
With that explanation out of the way, let's continue. Next, we take the number 665,653,315 and divide it by 2:
665,653,315 ÷ 2 = 332,826,657.5
If the quotient is a whole number, then 2 and 332,826,657.5 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 | 665,653,315 | |
| -1 | -665,653,315 |
Now, we try dividing 665,653,315 by 3:
665,653,315 ÷ 3 = 221,884,438.3333
If the quotient is a whole number, then 3 and 221,884,438.3333 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 | 665,653,315 | |
| -1 | -665,653,315 |
Let's try dividing by 4:
665,653,315 ÷ 4 = 166,413,328.75
If the quotient is a whole number, then 4 and 166,413,328.75 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 | 665,653,315 | |
| -1 | 665,653,315 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 361 | 1,805 | 368,783 | 1,843,915 | 7,006,877 | 35,034,385 | 133,130,663 | 665,653,315 |
| -1 | -5 | -19 | -95 | -361 | -1,805 | -368,783 | -1,843,915 | -7,006,877 | -35,034,385 | -133,130,663 | -665,653,315 |
Here are some more numbers to try:
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