A:
Positive:
1 x 1211858837 x 1731226913 x 932199191 x 133171397 x 1249339679 x 1784771261 x 961038827 x 13729
Negative:
-1 x -121185883-7 x -17312269-13 x -9321991-91 x -1331713-97 x -1249339-679 x -178477-1261 x -96103-8827 x -13729
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 121,185,883, 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 | 121,185,883 | |
| -1 | -121,185,883 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,185,883.
Example:
1 x 121,185,883 = 121,185,883
and
-1 x -121,185,883 = 121,185,883
Notice both answers equal 121,185,883
With that explanation out of the way, let's continue. Next, we take the number 121,185,883 and divide it by 2:
121,185,883 ÷ 2 = 60,592,941.5
If the quotient is a whole number, then 2 and 60,592,941.5 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 | 121,185,883 | |
| -1 | -121,185,883 |
Now, we try dividing 121,185,883 by 3:
121,185,883 ÷ 3 = 40,395,294.3333
If the quotient is a whole number, then 3 and 40,395,294.3333 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 | 121,185,883 | |
| -1 | -121,185,883 |
Let's try dividing by 4:
121,185,883 ÷ 4 = 30,296,470.75
If the quotient is a whole number, then 4 and 30,296,470.75 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 | 121,185,883 | |
| -1 | 121,185,883 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 97 | 679 | 1,261 | 8,827 | 13,729 | 96,103 | 178,477 | 1,249,339 | 1,331,713 | 9,321,991 | 17,312,269 | 121,185,883 |
| -1 | -7 | -13 | -91 | -97 | -679 | -1,261 | -8,827 | -13,729 | -96,103 | -178,477 | -1,249,339 | -1,331,713 | -9,321,991 | -17,312,269 | -121,185,883 |
Here are some more numbers to try:
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