A:
Positive:
1 x 1689282655 x 3378565311 x 1535711555 x 3071423367 x 4602951835 x 920594037 x 418458369 x 20185
Negative:
-1 x -168928265-5 x -33785653-11 x -15357115-55 x -3071423-367 x -460295-1835 x -92059-4037 x -41845-8369 x -20185
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 168,928,265, 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 | 168,928,265 | |
| -1 | -168,928,265 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 168,928,265.
Example:
1 x 168,928,265 = 168,928,265
and
-1 x -168,928,265 = 168,928,265
Notice both answers equal 168,928,265
With that explanation out of the way, let's continue. Next, we take the number 168,928,265 and divide it by 2:
168,928,265 ÷ 2 = 84,464,132.5
If the quotient is a whole number, then 2 and 84,464,132.5 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 | 168,928,265 | |
| -1 | -168,928,265 |
Now, we try dividing 168,928,265 by 3:
168,928,265 ÷ 3 = 56,309,421.6667
If the quotient is a whole number, then 3 and 56,309,421.6667 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 | 168,928,265 | |
| -1 | -168,928,265 |
Let's try dividing by 4:
168,928,265 ÷ 4 = 42,232,066.25
If the quotient is a whole number, then 4 and 42,232,066.25 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 | 168,928,265 | |
| -1 | 168,928,265 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 367 | 1,835 | 4,037 | 8,369 | 20,185 | 41,845 | 92,059 | 460,295 | 3,071,423 | 15,357,115 | 33,785,653 | 168,928,265 |
| -1 | -5 | -11 | -55 | -367 | -1,835 | -4,037 | -8,369 | -20,185 | -41,845 | -92,059 | -460,295 | -3,071,423 | -15,357,115 | -33,785,653 | -168,928,265 |
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