A:
Positive:
1 x 12111021131 x 390678147 x 2576813101 x 1199111823 x 1471571457 x 831233131 x 386814747 x 25513
Negative:
-1 x -121110211-31 x -3906781-47 x -2576813-101 x -1199111-823 x -147157-1457 x -83123-3131 x -38681-4747 x -25513
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 121,110,211, 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 | 121,110,211 | |
| -1 | -121,110,211 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,110,211.
Example:
1 x 121,110,211 = 121,110,211
and
-1 x -121,110,211 = 121,110,211
Notice both answers equal 121,110,211
With that explanation out of the way, let's continue. Next, we take the number 121,110,211 and divide it by 2:
121,110,211 ÷ 2 = 60,555,105.5
If the quotient is a whole number, then 2 and 60,555,105.5 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 | 121,110,211 | |
| -1 | -121,110,211 |
Now, we try dividing 121,110,211 by 3:
121,110,211 ÷ 3 = 40,370,070.3333
If the quotient is a whole number, then 3 and 40,370,070.3333 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 | 121,110,211 | |
| -1 | -121,110,211 |
Let's try dividing by 4:
121,110,211 ÷ 4 = 30,277,552.75
If the quotient is a whole number, then 4 and 30,277,552.75 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 | 121,110,211 | |
| -1 | 121,110,211 |
If you did it right, you will end up with this table:
| 1 | 31 | 47 | 101 | 823 | 1,457 | 3,131 | 4,747 | 25,513 | 38,681 | 83,123 | 147,157 | 1,199,111 | 2,576,813 | 3,906,781 | 121,110,211 |
| -1 | -31 | -47 | -101 | -823 | -1,457 | -3,131 | -4,747 | -25,513 | -38,681 | -83,123 | -147,157 | -1,199,111 | -2,576,813 | -3,906,781 | -121,110,211 |
Here are some more numbers to try:
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