A:
Positive:
1 x 138772711 x 12615717 x 8163141 x 33847181 x 7667187 x 7421451 x 3077697 x 1991
Negative:
-1 x -1387727-11 x -126157-17 x -81631-41 x -33847-181 x -7667-187 x -7421-451 x -3077-697 x -1991
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 1,387,727, 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 | 1,387,727 | |
| -1 | -1,387,727 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,387,727.
Example:
1 x 1,387,727 = 1,387,727
and
-1 x -1,387,727 = 1,387,727
Notice both answers equal 1,387,727
With that explanation out of the way, let's continue. Next, we take the number 1,387,727 and divide it by 2:
1,387,727 ÷ 2 = 693,863.5
If the quotient is a whole number, then 2 and 693,863.5 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 | 1,387,727 | |
| -1 | -1,387,727 |
Now, we try dividing 1,387,727 by 3:
1,387,727 ÷ 3 = 462,575.6667
If the quotient is a whole number, then 3 and 462,575.6667 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 | 1,387,727 | |
| -1 | -1,387,727 |
Let's try dividing by 4:
1,387,727 ÷ 4 = 346,931.75
If the quotient is a whole number, then 4 and 346,931.75 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 | 1,387,727 | |
| -1 | 1,387,727 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 41 | 181 | 187 | 451 | 697 | 1,991 | 3,077 | 7,421 | 7,667 | 33,847 | 81,631 | 126,157 | 1,387,727 |
| -1 | -11 | -17 | -41 | -181 | -187 | -451 | -697 | -1,991 | -3,077 | -7,421 | -7,667 | -33,847 | -81,631 | -126,157 | -1,387,727 |
Here are some more numbers to try:
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