A:
Positive:
1 x 38984055 x 7796817 x 55691531 x 12575535 x 111383155 x 25151217 x 179651085 x 3593
Negative:
-1 x -3898405-5 x -779681-7 x -556915-31 x -125755-35 x -111383-155 x -25151-217 x -17965-1085 x -3593
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 3,898,405, 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 | 3,898,405 | |
| -1 | -3,898,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,898,405.
Example:
1 x 3,898,405 = 3,898,405
and
-1 x -3,898,405 = 3,898,405
Notice both answers equal 3,898,405
With that explanation out of the way, let's continue. Next, we take the number 3,898,405 and divide it by 2:
3,898,405 ÷ 2 = 1,949,202.5
If the quotient is a whole number, then 2 and 1,949,202.5 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 | 3,898,405 | |
| -1 | -3,898,405 |
Now, we try dividing 3,898,405 by 3:
3,898,405 ÷ 3 = 1,299,468.3333
If the quotient is a whole number, then 3 and 1,299,468.3333 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 | 3,898,405 | |
| -1 | -3,898,405 |
Let's try dividing by 4:
3,898,405 ÷ 4 = 974,601.25
If the quotient is a whole number, then 4 and 974,601.25 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 | 3,898,405 | |
| -1 | 3,898,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 31 | 35 | 155 | 217 | 1,085 | 3,593 | 17,965 | 25,151 | 111,383 | 125,755 | 556,915 | 779,681 | 3,898,405 |
| -1 | -5 | -7 | -31 | -35 | -155 | -217 | -1,085 | -3,593 | -17,965 | -25,151 | -111,383 | -125,755 | -556,915 | -779,681 | -3,898,405 |
Here are some more numbers to try:
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