A:
Positive:
1 x 12325120717 x 725007141 x 300612797 x 1270631697 x 1768311649 x 747431823 x 676093977 x 30991
Negative:
-1 x -123251207-17 x -7250071-41 x -3006127-97 x -1270631-697 x -176831-1649 x -74743-1823 x -67609-3977 x -30991
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 123,251,207, 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 | 123,251,207 | |
| -1 | -123,251,207 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,251,207.
Example:
1 x 123,251,207 = 123,251,207
and
-1 x -123,251,207 = 123,251,207
Notice both answers equal 123,251,207
With that explanation out of the way, let's continue. Next, we take the number 123,251,207 and divide it by 2:
123,251,207 ÷ 2 = 61,625,603.5
If the quotient is a whole number, then 2 and 61,625,603.5 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 | 123,251,207 | |
| -1 | -123,251,207 |
Now, we try dividing 123,251,207 by 3:
123,251,207 ÷ 3 = 41,083,735.6667
If the quotient is a whole number, then 3 and 41,083,735.6667 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 | 123,251,207 | |
| -1 | -123,251,207 |
Let's try dividing by 4:
123,251,207 ÷ 4 = 30,812,801.75
If the quotient is a whole number, then 4 and 30,812,801.75 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 | 123,251,207 | |
| -1 | 123,251,207 |
If you did it right, you will end up with this table:
| 1 | 17 | 41 | 97 | 697 | 1,649 | 1,823 | 3,977 | 30,991 | 67,609 | 74,743 | 176,831 | 1,270,631 | 3,006,127 | 7,250,071 | 123,251,207 |
| -1 | -17 | -41 | -97 | -697 | -1,649 | -1,823 | -3,977 | -30,991 | -67,609 | -74,743 | -176,831 | -1,270,631 | -3,006,127 | -7,250,071 | -123,251,207 |
Here are some more numbers to try:
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