A:
Positive:
1 x 1213236255 x 2426472525 x 485294553 x 2289125125 x 970589265 x 4578251325 x 915656625 x 18313
Negative:
-1 x -121323625-5 x -24264725-25 x -4852945-53 x -2289125-125 x -970589-265 x -457825-1325 x -91565-6625 x -18313
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 121,323,625, 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 | 121,323,625 | |
| -1 | -121,323,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,323,625.
Example:
1 x 121,323,625 = 121,323,625
and
-1 x -121,323,625 = 121,323,625
Notice both answers equal 121,323,625
With that explanation out of the way, let's continue. Next, we take the number 121,323,625 and divide it by 2:
121,323,625 ÷ 2 = 60,661,812.5
If the quotient is a whole number, then 2 and 60,661,812.5 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 | 121,323,625 | |
| -1 | -121,323,625 |
Now, we try dividing 121,323,625 by 3:
121,323,625 ÷ 3 = 40,441,208.3333
If the quotient is a whole number, then 3 and 40,441,208.3333 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 | 121,323,625 | |
| -1 | -121,323,625 |
Let's try dividing by 4:
121,323,625 ÷ 4 = 30,330,906.25
If the quotient is a whole number, then 4 and 30,330,906.25 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 | 121,323,625 | |
| -1 | 121,323,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 53 | 125 | 265 | 1,325 | 6,625 | 18,313 | 91,565 | 457,825 | 970,589 | 2,289,125 | 4,852,945 | 24,264,725 | 121,323,625 |
| -1 | -5 | -25 | -53 | -125 | -265 | -1,325 | -6,625 | -18,313 | -91,565 | -457,825 | -970,589 | -2,289,125 | -4,852,945 | -24,264,725 | -121,323,625 |
Here are some more numbers to try:
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