A:
Positive:
1 x 12103378111 x 1100307119 x 637019973 x 1657997209 x 579109803 x 1507271387 x 872637933 x 15257
Negative:
-1 x -121033781-11 x -11003071-19 x -6370199-73 x -1657997-209 x -579109-803 x -150727-1387 x -87263-7933 x -15257
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 121,033,781, 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 | 121,033,781 | |
| -1 | -121,033,781 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,033,781.
Example:
1 x 121,033,781 = 121,033,781
and
-1 x -121,033,781 = 121,033,781
Notice both answers equal 121,033,781
With that explanation out of the way, let's continue. Next, we take the number 121,033,781 and divide it by 2:
121,033,781 ÷ 2 = 60,516,890.5
If the quotient is a whole number, then 2 and 60,516,890.5 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 | 121,033,781 | |
| -1 | -121,033,781 |
Now, we try dividing 121,033,781 by 3:
121,033,781 ÷ 3 = 40,344,593.6667
If the quotient is a whole number, then 3 and 40,344,593.6667 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 | 121,033,781 | |
| -1 | -121,033,781 |
Let's try dividing by 4:
121,033,781 ÷ 4 = 30,258,445.25
If the quotient is a whole number, then 4 and 30,258,445.25 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 | 121,033,781 | |
| -1 | 121,033,781 |
If you did it right, you will end up with this table:
| 1 | 11 | 19 | 73 | 209 | 803 | 1,387 | 7,933 | 15,257 | 87,263 | 150,727 | 579,109 | 1,657,997 | 6,370,199 | 11,003,071 | 121,033,781 |
| -1 | -11 | -19 | -73 | -209 | -803 | -1,387 | -7,933 | -15,257 | -87,263 | -150,727 | -579,109 | -1,657,997 | -6,370,199 | -11,003,071 | -121,033,781 |
Here are some more numbers to try:
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