A:
Positive:
1 x 20961593317 x 1233034997 x 2160989317 x 661249401 x 5227331649 x 1271175389 x 388976817 x 30749
Negative:
-1 x -209615933-17 x -12330349-97 x -2160989-317 x -661249-401 x -522733-1649 x -127117-5389 x -38897-6817 x -30749
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 209,615,933, 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 | 209,615,933 | |
| -1 | -209,615,933 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 209,615,933.
Example:
1 x 209,615,933 = 209,615,933
and
-1 x -209,615,933 = 209,615,933
Notice both answers equal 209,615,933
With that explanation out of the way, let's continue. Next, we take the number 209,615,933 and divide it by 2:
209,615,933 ÷ 2 = 104,807,966.5
If the quotient is a whole number, then 2 and 104,807,966.5 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 | 209,615,933 | |
| -1 | -209,615,933 |
Now, we try dividing 209,615,933 by 3:
209,615,933 ÷ 3 = 69,871,977.6667
If the quotient is a whole number, then 3 and 69,871,977.6667 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 | 209,615,933 | |
| -1 | -209,615,933 |
Let's try dividing by 4:
209,615,933 ÷ 4 = 52,403,983.25
If the quotient is a whole number, then 4 and 52,403,983.25 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 | 209,615,933 | |
| -1 | 209,615,933 |
If you did it right, you will end up with this table:
| 1 | 17 | 97 | 317 | 401 | 1,649 | 5,389 | 6,817 | 30,749 | 38,897 | 127,117 | 522,733 | 661,249 | 2,160,989 | 12,330,349 | 209,615,933 |
| -1 | -17 | -97 | -317 | -401 | -1,649 | -5,389 | -6,817 | -30,749 | -38,897 | -127,117 | -522,733 | -661,249 | -2,160,989 | -12,330,349 | -209,615,933 |
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