A:
Positive:
1 x 2612050555 x 5224101141 x 6370855163 x 1602485205 x 1274171815 x 3204976683 x 390857817 x 33415
Negative:
-1 x -261205055-5 x -52241011-41 x -6370855-163 x -1602485-205 x -1274171-815 x -320497-6683 x -39085-7817 x -33415
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 261,205,055, 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 | 261,205,055 | |
| -1 | -261,205,055 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 261,205,055.
Example:
1 x 261,205,055 = 261,205,055
and
-1 x -261,205,055 = 261,205,055
Notice both answers equal 261,205,055
With that explanation out of the way, let's continue. Next, we take the number 261,205,055 and divide it by 2:
261,205,055 ÷ 2 = 130,602,527.5
If the quotient is a whole number, then 2 and 130,602,527.5 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 | 261,205,055 | |
| -1 | -261,205,055 |
Now, we try dividing 261,205,055 by 3:
261,205,055 ÷ 3 = 87,068,351.6667
If the quotient is a whole number, then 3 and 87,068,351.6667 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 | 261,205,055 | |
| -1 | -261,205,055 |
Let's try dividing by 4:
261,205,055 ÷ 4 = 65,301,263.75
If the quotient is a whole number, then 4 and 65,301,263.75 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 | 261,205,055 | |
| -1 | 261,205,055 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 163 | 205 | 815 | 6,683 | 7,817 | 33,415 | 39,085 | 320,497 | 1,274,171 | 1,602,485 | 6,370,855 | 52,241,011 | 261,205,055 |
| -1 | -5 | -41 | -163 | -205 | -815 | -6,683 | -7,817 | -33,415 | -39,085 | -320,497 | -1,274,171 | -1,602,485 | -6,370,855 | -52,241,011 | -261,205,055 |
Here are some more numbers to try:
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