A:
Positive:
1 x 1250012155 x 2500024343 x 2907005215 x 581401421 x 2969151381 x 905152105 x 593836905 x 18103
Negative:
-1 x -125001215-5 x -25000243-43 x -2907005-215 x -581401-421 x -296915-1381 x -90515-2105 x -59383-6905 x -18103
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 125,001,215, 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 | 125,001,215 | |
| -1 | -125,001,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 125,001,215.
Example:
1 x 125,001,215 = 125,001,215
and
-1 x -125,001,215 = 125,001,215
Notice both answers equal 125,001,215
With that explanation out of the way, let's continue. Next, we take the number 125,001,215 and divide it by 2:
125,001,215 ÷ 2 = 62,500,607.5
If the quotient is a whole number, then 2 and 62,500,607.5 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 | 125,001,215 | |
| -1 | -125,001,215 |
Now, we try dividing 125,001,215 by 3:
125,001,215 ÷ 3 = 41,667,071.6667
If the quotient is a whole number, then 3 and 41,667,071.6667 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 | 125,001,215 | |
| -1 | -125,001,215 |
Let's try dividing by 4:
125,001,215 ÷ 4 = 31,250,303.75
If the quotient is a whole number, then 4 and 31,250,303.75 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 | 125,001,215 | |
| -1 | 125,001,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 215 | 421 | 1,381 | 2,105 | 6,905 | 18,103 | 59,383 | 90,515 | 296,915 | 581,401 | 2,907,005 | 25,000,243 | 125,001,215 |
| -1 | -5 | -43 | -215 | -421 | -1,381 | -2,105 | -6,905 | -18,103 | -59,383 | -90,515 | -296,915 | -581,401 | -2,907,005 | -25,000,243 | -125,001,215 |
Here are some more numbers to try:
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