A:
Positive:
1 x 21403255 x 42806511 x 19457525 x 8561343 x 4977555 x 38915181 x 11825215 x 9955275 x 7783473 x 4525905 x 23651075 x 1991
Negative:
-1 x -2140325-5 x -428065-11 x -194575-25 x -85613-43 x -49775-55 x -38915-181 x -11825-215 x -9955-275 x -7783-473 x -4525-905 x -2365-1075 x -1991
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 2,140,325, 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 | 2,140,325 | |
| -1 | -2,140,325 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,140,325.
Example:
1 x 2,140,325 = 2,140,325
and
-1 x -2,140,325 = 2,140,325
Notice both answers equal 2,140,325
With that explanation out of the way, let's continue. Next, we take the number 2,140,325 and divide it by 2:
2,140,325 ÷ 2 = 1,070,162.5
If the quotient is a whole number, then 2 and 1,070,162.5 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 | 2,140,325 | |
| -1 | -2,140,325 |
Now, we try dividing 2,140,325 by 3:
2,140,325 ÷ 3 = 713,441.6667
If the quotient is a whole number, then 3 and 713,441.6667 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 | 2,140,325 | |
| -1 | -2,140,325 |
Let's try dividing by 4:
2,140,325 ÷ 4 = 535,081.25
If the quotient is a whole number, then 4 and 535,081.25 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 | 2,140,325 | |
| -1 | 2,140,325 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 25 | 43 | 55 | 181 | 215 | 275 | 473 | 905 | 1,075 | 1,991 | 2,365 | 4,525 | 7,783 | 9,955 | 11,825 | 38,915 | 49,775 | 85,613 | 194,575 | 428,065 | 2,140,325 |
| -1 | -5 | -11 | -25 | -43 | -55 | -181 | -215 | -275 | -473 | -905 | -1,075 | -1,991 | -2,365 | -4,525 | -7,783 | -9,955 | -11,825 | -38,915 | -49,775 | -85,613 | -194,575 | -428,065 | -2,140,325 |
Here are some more numbers to try:
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