A:
Positive:
1 x 1251242155 x 2502484319 x 658548531 x 403626595 x 1317097155 x 807253589 x 2124352945 x 42487
Negative:
-1 x -125124215-5 x -25024843-19 x -6585485-31 x -4036265-95 x -1317097-155 x -807253-589 x -212435-2945 x -42487
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 125,124,215, 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 | 125,124,215 | |
| -1 | -125,124,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 125,124,215.
Example:
1 x 125,124,215 = 125,124,215
and
-1 x -125,124,215 = 125,124,215
Notice both answers equal 125,124,215
With that explanation out of the way, let's continue. Next, we take the number 125,124,215 and divide it by 2:
125,124,215 ÷ 2 = 62,562,107.5
If the quotient is a whole number, then 2 and 62,562,107.5 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 | 125,124,215 | |
| -1 | -125,124,215 |
Now, we try dividing 125,124,215 by 3:
125,124,215 ÷ 3 = 41,708,071.6667
If the quotient is a whole number, then 3 and 41,708,071.6667 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 | 125,124,215 | |
| -1 | -125,124,215 |
Let's try dividing by 4:
125,124,215 ÷ 4 = 31,281,053.75
If the quotient is a whole number, then 4 and 31,281,053.75 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 | 125,124,215 | |
| -1 | 125,124,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 31 | 95 | 155 | 589 | 2,945 | 42,487 | 212,435 | 807,253 | 1,317,097 | 4,036,265 | 6,585,485 | 25,024,843 | 125,124,215 |
| -1 | -5 | -19 | -31 | -95 | -155 | -589 | -2,945 | -42,487 | -212,435 | -807,253 | -1,317,097 | -4,036,265 | -6,585,485 | -25,024,843 | -125,124,215 |
Here are some more numbers to try:
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