A:
Positive:
1 x 39018655 x 78037311 x 35471555 x 7094361 x 63965305 x 12793671 x 58151163 x 3355
Negative:
-1 x -3901865-5 x -780373-11 x -354715-55 x -70943-61 x -63965-305 x -12793-671 x -5815-1163 x -3355
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 3,901,865, 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 | 3,901,865 | |
| -1 | -3,901,865 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,901,865.
Example:
1 x 3,901,865 = 3,901,865
and
-1 x -3,901,865 = 3,901,865
Notice both answers equal 3,901,865
With that explanation out of the way, let's continue. Next, we take the number 3,901,865 and divide it by 2:
3,901,865 ÷ 2 = 1,950,932.5
If the quotient is a whole number, then 2 and 1,950,932.5 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 | 3,901,865 | |
| -1 | -3,901,865 |
Now, we try dividing 3,901,865 by 3:
3,901,865 ÷ 3 = 1,300,621.6667
If the quotient is a whole number, then 3 and 1,300,621.6667 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 | 3,901,865 | |
| -1 | -3,901,865 |
Let's try dividing by 4:
3,901,865 ÷ 4 = 975,466.25
If the quotient is a whole number, then 4 and 975,466.25 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 | 3,901,865 | |
| -1 | 3,901,865 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 61 | 305 | 671 | 1,163 | 3,355 | 5,815 | 12,793 | 63,965 | 70,943 | 354,715 | 780,373 | 3,901,865 |
| -1 | -5 | -11 | -55 | -61 | -305 | -671 | -1,163 | -3,355 | -5,815 | -12,793 | -63,965 | -70,943 | -354,715 | -780,373 | -3,901,865 |
Here are some more numbers to try:
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