A:
Positive:
1 x 391716855 x 78343377 x 559595535 x 1119191401 x 976852005 x 195372791 x 140352807 x 13955
Negative:
-1 x -39171685-5 x -7834337-7 x -5595955-35 x -1119191-401 x -97685-2005 x -19537-2791 x -14035-2807 x -13955
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 39,171,685, 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 | 39,171,685 | |
| -1 | -39,171,685 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 39,171,685.
Example:
1 x 39,171,685 = 39,171,685
and
-1 x -39,171,685 = 39,171,685
Notice both answers equal 39,171,685
With that explanation out of the way, let's continue. Next, we take the number 39,171,685 and divide it by 2:
39,171,685 ÷ 2 = 19,585,842.5
If the quotient is a whole number, then 2 and 19,585,842.5 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 | 39,171,685 | |
| -1 | -39,171,685 |
Now, we try dividing 39,171,685 by 3:
39,171,685 ÷ 3 = 13,057,228.3333
If the quotient is a whole number, then 3 and 13,057,228.3333 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 | 39,171,685 | |
| -1 | -39,171,685 |
Let's try dividing by 4:
39,171,685 ÷ 4 = 9,792,921.25
If the quotient is a whole number, then 4 and 9,792,921.25 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 | 39,171,685 | |
| -1 | 39,171,685 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 401 | 2,005 | 2,791 | 2,807 | 13,955 | 14,035 | 19,537 | 97,685 | 1,119,191 | 5,595,955 | 7,834,337 | 39,171,685 |
| -1 | -5 | -7 | -35 | -401 | -2,005 | -2,791 | -2,807 | -13,955 | -14,035 | -19,537 | -97,685 | -1,119,191 | -5,595,955 | -7,834,337 | -39,171,685 |
Here are some more numbers to try:
Try the factor calculator