A:
Positive:
1 x 394155855 x 788311711 x 358323555 x 716647137 x 287705685 x 575411507 x 261555231 x 7535
Negative:
-1 x -39415585-5 x -7883117-11 x -3583235-55 x -716647-137 x -287705-685 x -57541-1507 x -26155-5231 x -7535
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 39,415,585, 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 | 39,415,585 | |
| -1 | -39,415,585 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 39,415,585.
Example:
1 x 39,415,585 = 39,415,585
and
-1 x -39,415,585 = 39,415,585
Notice both answers equal 39,415,585
With that explanation out of the way, let's continue. Next, we take the number 39,415,585 and divide it by 2:
39,415,585 ÷ 2 = 19,707,792.5
If the quotient is a whole number, then 2 and 19,707,792.5 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 | 39,415,585 | |
| -1 | -39,415,585 |
Now, we try dividing 39,415,585 by 3:
39,415,585 ÷ 3 = 13,138,528.3333
If the quotient is a whole number, then 3 and 13,138,528.3333 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 | 39,415,585 | |
| -1 | -39,415,585 |
Let's try dividing by 4:
39,415,585 ÷ 4 = 9,853,896.25
If the quotient is a whole number, then 4 and 9,853,896.25 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 | 39,415,585 | |
| -1 | 39,415,585 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 137 | 685 | 1,507 | 5,231 | 7,535 | 26,155 | 57,541 | 287,705 | 716,647 | 3,583,235 | 7,883,117 | 39,415,585 |
| -1 | -5 | -11 | -55 | -137 | -685 | -1,507 | -5,231 | -7,535 | -26,155 | -57,541 | -287,705 | -716,647 | -3,583,235 | -7,883,117 | -39,415,585 |
Here are some more numbers to try:
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