A:
Positive:
1 x 1216356617 x 1737652323 x 528850731 x 3923731161 x 755501217 x 560533713 x 1705974991 x 24371
Negative:
-1 x -121635661-7 x -17376523-23 x -5288507-31 x -3923731-161 x -755501-217 x -560533-713 x -170597-4991 x -24371
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 121,635,661, 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 | 121,635,661 | |
| -1 | -121,635,661 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,635,661.
Example:
1 x 121,635,661 = 121,635,661
and
-1 x -121,635,661 = 121,635,661
Notice both answers equal 121,635,661
With that explanation out of the way, let's continue. Next, we take the number 121,635,661 and divide it by 2:
121,635,661 ÷ 2 = 60,817,830.5
If the quotient is a whole number, then 2 and 60,817,830.5 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 | 121,635,661 | |
| -1 | -121,635,661 |
Now, we try dividing 121,635,661 by 3:
121,635,661 ÷ 3 = 40,545,220.3333
If the quotient is a whole number, then 3 and 40,545,220.3333 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 | 121,635,661 | |
| -1 | -121,635,661 |
Let's try dividing by 4:
121,635,661 ÷ 4 = 30,408,915.25
If the quotient is a whole number, then 4 and 30,408,915.25 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 | 121,635,661 | |
| -1 | 121,635,661 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 31 | 161 | 217 | 713 | 4,991 | 24,371 | 170,597 | 560,533 | 755,501 | 3,923,731 | 5,288,507 | 17,376,523 | 121,635,661 |
| -1 | -7 | -23 | -31 | -161 | -217 | -713 | -4,991 | -24,371 | -170,597 | -560,533 | -755,501 | -3,923,731 | -5,288,507 | -17,376,523 | -121,635,661 |
Here are some more numbers to try:
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