A:
Positive:
1 x 39256917 x 56081311 x 35688117 x 23092377 x 50983119 x 32989187 x 209931309 x 2999
Negative:
-1 x -3925691-7 x -560813-11 x -356881-17 x -230923-77 x -50983-119 x -32989-187 x -20993-1309 x -2999
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 3,925,691, 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 | 3,925,691 | |
| -1 | -3,925,691 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,925,691.
Example:
1 x 3,925,691 = 3,925,691
and
-1 x -3,925,691 = 3,925,691
Notice both answers equal 3,925,691
With that explanation out of the way, let's continue. Next, we take the number 3,925,691 and divide it by 2:
3,925,691 ÷ 2 = 1,962,845.5
If the quotient is a whole number, then 2 and 1,962,845.5 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 | 3,925,691 | |
| -1 | -3,925,691 |
Now, we try dividing 3,925,691 by 3:
3,925,691 ÷ 3 = 1,308,563.6667
If the quotient is a whole number, then 3 and 1,308,563.6667 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 | 3,925,691 | |
| -1 | -3,925,691 |
Let's try dividing by 4:
3,925,691 ÷ 4 = 981,422.75
If the quotient is a whole number, then 4 and 981,422.75 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 | 3,925,691 | |
| -1 | 3,925,691 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 77 | 119 | 187 | 1,309 | 2,999 | 20,993 | 32,989 | 50,983 | 230,923 | 356,881 | 560,813 | 3,925,691 |
| -1 | -7 | -11 | -17 | -77 | -119 | -187 | -1,309 | -2,999 | -20,993 | -32,989 | -50,983 | -230,923 | -356,881 | -560,813 | -3,925,691 |
Here are some more numbers to try:
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