A:
Positive:
1 x 21703155 x 4340637 x 31004535 x 6200959 x 36785295 x 7357413 x 52551051 x 2065
Negative:
-1 x -2170315-5 x -434063-7 x -310045-35 x -62009-59 x -36785-295 x -7357-413 x -5255-1051 x -2065
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 2,170,315, 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 | 2,170,315 | |
| -1 | -2,170,315 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,170,315.
Example:
1 x 2,170,315 = 2,170,315
and
-1 x -2,170,315 = 2,170,315
Notice both answers equal 2,170,315
With that explanation out of the way, let's continue. Next, we take the number 2,170,315 and divide it by 2:
2,170,315 ÷ 2 = 1,085,157.5
If the quotient is a whole number, then 2 and 1,085,157.5 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 | 2,170,315 | |
| -1 | -2,170,315 |
Now, we try dividing 2,170,315 by 3:
2,170,315 ÷ 3 = 723,438.3333
If the quotient is a whole number, then 3 and 723,438.3333 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 | 2,170,315 | |
| -1 | -2,170,315 |
Let's try dividing by 4:
2,170,315 ÷ 4 = 542,578.75
If the quotient is a whole number, then 4 and 542,578.75 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 | 2,170,315 | |
| -1 | 2,170,315 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 59 | 295 | 413 | 1,051 | 2,065 | 5,255 | 7,357 | 36,785 | 62,009 | 310,045 | 434,063 | 2,170,315 |
| -1 | -5 | -7 | -35 | -59 | -295 | -413 | -1,051 | -2,065 | -5,255 | -7,357 | -36,785 | -62,009 | -310,045 | -434,063 | -2,170,315 |
Here are some more numbers to try:
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