A:
Positive:
1 x 2387271355 x 47745427101 x 2363635157 x 1520555505 x 472727785 x 3041113011 x 7928515055 x 15857
Negative:
-1 x -238727135-5 x -47745427-101 x -2363635-157 x -1520555-505 x -472727-785 x -304111-3011 x -79285-15055 x -15857
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 238,727,135, 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 | 238,727,135 | |
| -1 | -238,727,135 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 238,727,135.
Example:
1 x 238,727,135 = 238,727,135
and
-1 x -238,727,135 = 238,727,135
Notice both answers equal 238,727,135
With that explanation out of the way, let's continue. Next, we take the number 238,727,135 and divide it by 2:
238,727,135 ÷ 2 = 119,363,567.5
If the quotient is a whole number, then 2 and 119,363,567.5 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 | 238,727,135 | |
| -1 | -238,727,135 |
Now, we try dividing 238,727,135 by 3:
238,727,135 ÷ 3 = 79,575,711.6667
If the quotient is a whole number, then 3 and 79,575,711.6667 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 | 238,727,135 | |
| -1 | -238,727,135 |
Let's try dividing by 4:
238,727,135 ÷ 4 = 59,681,783.75
If the quotient is a whole number, then 4 and 59,681,783.75 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 | 238,727,135 | |
| -1 | 238,727,135 |
If you did it right, you will end up with this table:
| 1 | 5 | 101 | 157 | 505 | 785 | 3,011 | 15,055 | 15,857 | 79,285 | 304,111 | 472,727 | 1,520,555 | 2,363,635 | 47,745,427 | 238,727,135 |
| -1 | -5 | -101 | -157 | -505 | -785 | -3,011 | -15,055 | -15,857 | -79,285 | -304,111 | -472,727 | -1,520,555 | -2,363,635 | -47,745,427 | -238,727,135 |
Here are some more numbers to try:
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