A:
Positive:
1 x 1285021855 x 257004377 x 1835745535 x 3671491107 x 1200955535 x 240191749 x 1715653745 x 34313
Negative:
-1 x -128502185-5 x -25700437-7 x -18357455-35 x -3671491-107 x -1200955-535 x -240191-749 x -171565-3745 x -34313
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 128,502,185, 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 | 128,502,185 | |
| -1 | -128,502,185 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 128,502,185.
Example:
1 x 128,502,185 = 128,502,185
and
-1 x -128,502,185 = 128,502,185
Notice both answers equal 128,502,185
With that explanation out of the way, let's continue. Next, we take the number 128,502,185 and divide it by 2:
128,502,185 ÷ 2 = 64,251,092.5
If the quotient is a whole number, then 2 and 64,251,092.5 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 | 128,502,185 | |
| -1 | -128,502,185 |
Now, we try dividing 128,502,185 by 3:
128,502,185 ÷ 3 = 42,834,061.6667
If the quotient is a whole number, then 3 and 42,834,061.6667 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 | 128,502,185 | |
| -1 | -128,502,185 |
Let's try dividing by 4:
128,502,185 ÷ 4 = 32,125,546.25
If the quotient is a whole number, then 4 and 32,125,546.25 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 | 128,502,185 | |
| -1 | 128,502,185 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 107 | 535 | 749 | 3,745 | 34,313 | 171,565 | 240,191 | 1,200,955 | 3,671,491 | 18,357,455 | 25,700,437 | 128,502,185 |
| -1 | -5 | -7 | -35 | -107 | -535 | -749 | -3,745 | -34,313 | -171,565 | -240,191 | -1,200,955 | -3,671,491 | -18,357,455 | -25,700,437 | -128,502,185 |
Here are some more numbers to try:
Try the factor calculator