A:
Positive:
1 x 260510913 x 20039319 x 13711153 x 49153199 x 13091247 x 10547689 x 37811007 x 2587
Negative:
-1 x -2605109-13 x -200393-19 x -137111-53 x -49153-199 x -13091-247 x -10547-689 x -3781-1007 x -2587
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 2,605,109, 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 | 2,605,109 | |
| -1 | -2,605,109 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,605,109.
Example:
1 x 2,605,109 = 2,605,109
and
-1 x -2,605,109 = 2,605,109
Notice both answers equal 2,605,109
With that explanation out of the way, let's continue. Next, we take the number 2,605,109 and divide it by 2:
2,605,109 ÷ 2 = 1,302,554.5
If the quotient is a whole number, then 2 and 1,302,554.5 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 | 2,605,109 | |
| -1 | -2,605,109 |
Now, we try dividing 2,605,109 by 3:
2,605,109 ÷ 3 = 868,369.6667
If the quotient is a whole number, then 3 and 868,369.6667 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 | 2,605,109 | |
| -1 | -2,605,109 |
Let's try dividing by 4:
2,605,109 ÷ 4 = 651,277.25
If the quotient is a whole number, then 4 and 651,277.25 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 | 2,605,109 | |
| -1 | 2,605,109 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 53 | 199 | 247 | 689 | 1,007 | 2,587 | 3,781 | 10,547 | 13,091 | 49,153 | 137,111 | 200,393 | 2,605,109 |
| -1 | -13 | -19 | -53 | -199 | -247 | -689 | -1,007 | -2,587 | -3,781 | -10,547 | -13,091 | -49,153 | -137,111 | -200,393 | -2,605,109 |
Here are some more numbers to try:
Try the factor calculator