A:
Positive:
1 x 1231515117 x 1759307373 x 1687007401 x 307111511 x 241001601 x 2049112807 x 438734207 x 29273
Negative:
-1 x -123151511-7 x -17593073-73 x -1687007-401 x -307111-511 x -241001-601 x -204911-2807 x -43873-4207 x -29273
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 123,151,511, 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 | 123,151,511 | |
| -1 | -123,151,511 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,151,511.
Example:
1 x 123,151,511 = 123,151,511
and
-1 x -123,151,511 = 123,151,511
Notice both answers equal 123,151,511
With that explanation out of the way, let's continue. Next, we take the number 123,151,511 and divide it by 2:
123,151,511 ÷ 2 = 61,575,755.5
If the quotient is a whole number, then 2 and 61,575,755.5 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 | 123,151,511 | |
| -1 | -123,151,511 |
Now, we try dividing 123,151,511 by 3:
123,151,511 ÷ 3 = 41,050,503.6667
If the quotient is a whole number, then 3 and 41,050,503.6667 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 | 123,151,511 | |
| -1 | -123,151,511 |
Let's try dividing by 4:
123,151,511 ÷ 4 = 30,787,877.75
If the quotient is a whole number, then 4 and 30,787,877.75 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 | 123,151,511 | |
| -1 | 123,151,511 |
If you did it right, you will end up with this table:
| 1 | 7 | 73 | 401 | 511 | 601 | 2,807 | 4,207 | 29,273 | 43,873 | 204,911 | 241,001 | 307,111 | 1,687,007 | 17,593,073 | 123,151,511 |
| -1 | -7 | -73 | -401 | -511 | -601 | -2,807 | -4,207 | -29,273 | -43,873 | -204,911 | -241,001 | -307,111 | -1,687,007 | -17,593,073 | -123,151,511 |
Here are some more numbers to try:
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