A:
Positive:
1 x 25406055 x 50812131 x 8195537 x 68665155 x 16391185 x 13733443 x 57351147 x 2215
Negative:
-1 x -2540605-5 x -508121-31 x -81955-37 x -68665-155 x -16391-185 x -13733-443 x -5735-1147 x -2215
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 2,540,605, 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 | 2,540,605 | |
| -1 | -2,540,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,540,605.
Example:
1 x 2,540,605 = 2,540,605
and
-1 x -2,540,605 = 2,540,605
Notice both answers equal 2,540,605
With that explanation out of the way, let's continue. Next, we take the number 2,540,605 and divide it by 2:
2,540,605 ÷ 2 = 1,270,302.5
If the quotient is a whole number, then 2 and 1,270,302.5 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 | 2,540,605 | |
| -1 | -2,540,605 |
Now, we try dividing 2,540,605 by 3:
2,540,605 ÷ 3 = 846,868.3333
If the quotient is a whole number, then 3 and 846,868.3333 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 | 2,540,605 | |
| -1 | -2,540,605 |
Let's try dividing by 4:
2,540,605 ÷ 4 = 635,151.25
If the quotient is a whole number, then 4 and 635,151.25 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 | 2,540,605 | |
| -1 | 2,540,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 37 | 155 | 185 | 443 | 1,147 | 2,215 | 5,735 | 13,733 | 16,391 | 68,665 | 81,955 | 508,121 | 2,540,605 |
| -1 | -5 | -31 | -37 | -155 | -185 | -443 | -1,147 | -2,215 | -5,735 | -13,733 | -16,391 | -68,665 | -81,955 | -508,121 | -2,540,605 |
Here are some more numbers to try:
Try the factor calculator