A:
Positive:
1 x 1210222097 x 1728888711 x 1100201949 x 246984177 x 1571717113 x 1070993539 x 224531791 x 1529991243 x 973631987 x 609075537 x 218578701 x 13909
Negative:
-1 x -121022209-7 x -17288887-11 x -11002019-49 x -2469841-77 x -1571717-113 x -1070993-539 x -224531-791 x -152999-1243 x -97363-1987 x -60907-5537 x -21857-8701 x -13909
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 121,022,209, 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 | 121,022,209 | |
| -1 | -121,022,209 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,022,209.
Example:
1 x 121,022,209 = 121,022,209
and
-1 x -121,022,209 = 121,022,209
Notice both answers equal 121,022,209
With that explanation out of the way, let's continue. Next, we take the number 121,022,209 and divide it by 2:
121,022,209 ÷ 2 = 60,511,104.5
If the quotient is a whole number, then 2 and 60,511,104.5 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 | 121,022,209 | |
| -1 | -121,022,209 |
Now, we try dividing 121,022,209 by 3:
121,022,209 ÷ 3 = 40,340,736.3333
If the quotient is a whole number, then 3 and 40,340,736.3333 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 | 121,022,209 | |
| -1 | -121,022,209 |
Let's try dividing by 4:
121,022,209 ÷ 4 = 30,255,552.25
If the quotient is a whole number, then 4 and 30,255,552.25 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 | 121,022,209 | |
| -1 | 121,022,209 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 49 | 77 | 113 | 539 | 791 | 1,243 | 1,987 | 5,537 | 8,701 | 13,909 | 21,857 | 60,907 | 97,363 | 152,999 | 224,531 | 1,070,993 | 1,571,717 | 2,469,841 | 11,002,019 | 17,288,887 | 121,022,209 |
| -1 | -7 | -11 | -49 | -77 | -113 | -539 | -791 | -1,243 | -1,987 | -5,537 | -8,701 | -13,909 | -21,857 | -60,907 | -97,363 | -152,999 | -224,531 | -1,070,993 | -1,571,717 | -2,469,841 | -11,002,019 | -17,288,887 | -121,022,209 |
Here are some more numbers to try:
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