A:
Positive:
1 x 2113203355 x 4226406731 x 6816785155 x 1363357757 x 2791551801 x 1173353785 x 558319005 x 23467
Negative:
-1 x -211320335-5 x -42264067-31 x -6816785-155 x -1363357-757 x -279155-1801 x -117335-3785 x -55831-9005 x -23467
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 211,320,335, 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 | 211,320,335 | |
| -1 | -211,320,335 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 211,320,335.
Example:
1 x 211,320,335 = 211,320,335
and
-1 x -211,320,335 = 211,320,335
Notice both answers equal 211,320,335
With that explanation out of the way, let's continue. Next, we take the number 211,320,335 and divide it by 2:
211,320,335 ÷ 2 = 105,660,167.5
If the quotient is a whole number, then 2 and 105,660,167.5 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 | 211,320,335 | |
| -1 | -211,320,335 |
Now, we try dividing 211,320,335 by 3:
211,320,335 ÷ 3 = 70,440,111.6667
If the quotient is a whole number, then 3 and 70,440,111.6667 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 | 211,320,335 | |
| -1 | -211,320,335 |
Let's try dividing by 4:
211,320,335 ÷ 4 = 52,830,083.75
If the quotient is a whole number, then 4 and 52,830,083.75 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 | 211,320,335 | |
| -1 | 211,320,335 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 757 | 1,801 | 3,785 | 9,005 | 23,467 | 55,831 | 117,335 | 279,155 | 1,363,357 | 6,816,785 | 42,264,067 | 211,320,335 |
| -1 | -5 | -31 | -155 | -757 | -1,801 | -3,785 | -9,005 | -23,467 | -55,831 | -117,335 | -279,155 | -1,363,357 | -6,816,785 | -42,264,067 | -211,320,335 |
Here are some more numbers to try:
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