A:
Positive:
1 x 39911417 x 57016311 x 36283117 x 23477377 x 51833119 x 33539187 x 213431309 x 3049
Negative:
-1 x -3991141-7 x -570163-11 x -362831-17 x -234773-77 x -51833-119 x -33539-187 x -21343-1309 x -3049
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 3,991,141, 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 | 3,991,141 | |
| -1 | -3,991,141 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,991,141.
Example:
1 x 3,991,141 = 3,991,141
and
-1 x -3,991,141 = 3,991,141
Notice both answers equal 3,991,141
With that explanation out of the way, let's continue. Next, we take the number 3,991,141 and divide it by 2:
3,991,141 ÷ 2 = 1,995,570.5
If the quotient is a whole number, then 2 and 1,995,570.5 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 | 3,991,141 | |
| -1 | -3,991,141 |
Now, we try dividing 3,991,141 by 3:
3,991,141 ÷ 3 = 1,330,380.3333
If the quotient is a whole number, then 3 and 1,330,380.3333 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 | 3,991,141 | |
| -1 | -3,991,141 |
Let's try dividing by 4:
3,991,141 ÷ 4 = 997,785.25
If the quotient is a whole number, then 4 and 997,785.25 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 | 3,991,141 | |
| -1 | 3,991,141 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 77 | 119 | 187 | 1,309 | 3,049 | 21,343 | 33,539 | 51,833 | 234,773 | 362,831 | 570,163 | 3,991,141 |
| -1 | -7 | -11 | -17 | -77 | -119 | -187 | -1,309 | -3,049 | -21,343 | -33,539 | -51,833 | -234,773 | -362,831 | -570,163 | -3,991,141 |
Here are some more numbers to try:
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