A:
Positive:
1 x 2132332155 x 4264664313 x 1640255565 x 3280511169 x 1261735277 x 769795845 x 252347911 x 2340651385 x 1539593601 x 592154555 x 4681311843 x 18005
Negative:
-1 x -213233215-5 x -42646643-13 x -16402555-65 x -3280511-169 x -1261735-277 x -769795-845 x -252347-911 x -234065-1385 x -153959-3601 x -59215-4555 x -46813-11843 x -18005
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 213,233,215, 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 | 213,233,215 | |
| -1 | -213,233,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 213,233,215.
Example:
1 x 213,233,215 = 213,233,215
and
-1 x -213,233,215 = 213,233,215
Notice both answers equal 213,233,215
With that explanation out of the way, let's continue. Next, we take the number 213,233,215 and divide it by 2:
213,233,215 ÷ 2 = 106,616,607.5
If the quotient is a whole number, then 2 and 106,616,607.5 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 | 213,233,215 | |
| -1 | -213,233,215 |
Now, we try dividing 213,233,215 by 3:
213,233,215 ÷ 3 = 71,077,738.3333
If the quotient is a whole number, then 3 and 71,077,738.3333 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 | 213,233,215 | |
| -1 | -213,233,215 |
Let's try dividing by 4:
213,233,215 ÷ 4 = 53,308,303.75
If the quotient is a whole number, then 4 and 53,308,303.75 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 | 213,233,215 | |
| -1 | 213,233,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 169 | 277 | 845 | 911 | 1,385 | 3,601 | 4,555 | 11,843 | 18,005 | 46,813 | 59,215 | 153,959 | 234,065 | 252,347 | 769,795 | 1,261,735 | 3,280,511 | 16,402,555 | 42,646,643 | 213,233,215 |
| -1 | -5 | -13 | -65 | -169 | -277 | -845 | -911 | -1,385 | -3,601 | -4,555 | -11,843 | -18,005 | -46,813 | -59,215 | -153,959 | -234,065 | -252,347 | -769,795 | -1,261,735 | -3,280,511 | -16,402,555 | -42,646,643 | -213,233,215 |
Here are some more numbers to try:
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