A:
Positive:
1 x 21310303311 x 1937300313 x 16392541143 x 1490231449 x 4746173319 x 642074939 x 431475837 x 36509
Negative:
-1 x -213103033-11 x -19373003-13 x -16392541-143 x -1490231-449 x -474617-3319 x -64207-4939 x -43147-5837 x -36509
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 213,103,033, 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 | 213,103,033 | |
| -1 | -213,103,033 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 213,103,033.
Example:
1 x 213,103,033 = 213,103,033
and
-1 x -213,103,033 = 213,103,033
Notice both answers equal 213,103,033
With that explanation out of the way, let's continue. Next, we take the number 213,103,033 and divide it by 2:
213,103,033 ÷ 2 = 106,551,516.5
If the quotient is a whole number, then 2 and 106,551,516.5 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 | 213,103,033 | |
| -1 | -213,103,033 |
Now, we try dividing 213,103,033 by 3:
213,103,033 ÷ 3 = 71,034,344.3333
If the quotient is a whole number, then 3 and 71,034,344.3333 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 | 213,103,033 | |
| -1 | -213,103,033 |
Let's try dividing by 4:
213,103,033 ÷ 4 = 53,275,758.25
If the quotient is a whole number, then 4 and 53,275,758.25 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 | 213,103,033 | |
| -1 | 213,103,033 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 449 | 3,319 | 4,939 | 5,837 | 36,509 | 43,147 | 64,207 | 474,617 | 1,490,231 | 16,392,541 | 19,373,003 | 213,103,033 |
| -1 | -11 | -13 | -143 | -449 | -3,319 | -4,939 | -5,837 | -36,509 | -43,147 | -64,207 | -474,617 | -1,490,231 | -16,392,541 | -19,373,003 | -213,103,033 |
Here are some more numbers to try:
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