A:
Positive:
1 x 1251652155 x 250330437 x 1788074535 x 3576149149 x 840035745 x 1680071043 x 1200055215 x 24001
Negative:
-1 x -125165215-5 x -25033043-7 x -17880745-35 x -3576149-149 x -840035-745 x -168007-1043 x -120005-5215 x -24001
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 125,165,215, 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 | 125,165,215 | |
| -1 | -125,165,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 125,165,215.
Example:
1 x 125,165,215 = 125,165,215
and
-1 x -125,165,215 = 125,165,215
Notice both answers equal 125,165,215
With that explanation out of the way, let's continue. Next, we take the number 125,165,215 and divide it by 2:
125,165,215 ÷ 2 = 62,582,607.5
If the quotient is a whole number, then 2 and 62,582,607.5 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 | 125,165,215 | |
| -1 | -125,165,215 |
Now, we try dividing 125,165,215 by 3:
125,165,215 ÷ 3 = 41,721,738.3333
If the quotient is a whole number, then 3 and 41,721,738.3333 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 | 125,165,215 | |
| -1 | -125,165,215 |
Let's try dividing by 4:
125,165,215 ÷ 4 = 31,291,303.75
If the quotient is a whole number, then 4 and 31,291,303.75 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 | 125,165,215 | |
| -1 | 125,165,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 149 | 745 | 1,043 | 5,215 | 24,001 | 120,005 | 168,007 | 840,035 | 3,576,149 | 17,880,745 | 25,033,043 | 125,165,215 |
| -1 | -5 | -7 | -35 | -149 | -745 | -1,043 | -5,215 | -24,001 | -120,005 | -168,007 | -840,035 | -3,576,149 | -17,880,745 | -25,033,043 | -125,165,215 |
Here are some more numbers to try:
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