A:
Positive:
1 x 405853917 x 579791311 x 368958177 x 527083193 x 2102871351 x 300412123 x 191172731 x 14861
Negative:
-1 x -40585391-7 x -5797913-11 x -3689581-77 x -527083-193 x -210287-1351 x -30041-2123 x -19117-2731 x -14861
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 40,585,391, 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 | 40,585,391 | |
| -1 | -40,585,391 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 40,585,391.
Example:
1 x 40,585,391 = 40,585,391
and
-1 x -40,585,391 = 40,585,391
Notice both answers equal 40,585,391
With that explanation out of the way, let's continue. Next, we take the number 40,585,391 and divide it by 2:
40,585,391 ÷ 2 = 20,292,695.5
If the quotient is a whole number, then 2 and 20,292,695.5 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 | 40,585,391 | |
| -1 | -40,585,391 |
Now, we try dividing 40,585,391 by 3:
40,585,391 ÷ 3 = 13,528,463.6667
If the quotient is a whole number, then 3 and 13,528,463.6667 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 | 40,585,391 | |
| -1 | -40,585,391 |
Let's try dividing by 4:
40,585,391 ÷ 4 = 10,146,347.75
If the quotient is a whole number, then 4 and 10,146,347.75 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 | 40,585,391 | |
| -1 | 40,585,391 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 193 | 1,351 | 2,123 | 2,731 | 14,861 | 19,117 | 30,041 | 210,287 | 527,083 | 3,689,581 | 5,797,913 | 40,585,391 |
| -1 | -7 | -11 | -77 | -193 | -1,351 | -2,123 | -2,731 | -14,861 | -19,117 | -30,041 | -210,287 | -527,083 | -3,689,581 | -5,797,913 | -40,585,391 |
Here are some more numbers to try:
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