A:
Positive:
1 x 26136155317 x 1537420997 x 2694449353 x 740401449 x 5820971649 x 1584976001 x 435537633 x 34241
Negative:
-1 x -261361553-17 x -15374209-97 x -2694449-353 x -740401-449 x -582097-1649 x -158497-6001 x -43553-7633 x -34241
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 261,361,553, 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 | 261,361,553 | |
| -1 | -261,361,553 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 261,361,553.
Example:
1 x 261,361,553 = 261,361,553
and
-1 x -261,361,553 = 261,361,553
Notice both answers equal 261,361,553
With that explanation out of the way, let's continue. Next, we take the number 261,361,553 and divide it by 2:
261,361,553 ÷ 2 = 130,680,776.5
If the quotient is a whole number, then 2 and 130,680,776.5 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 | 261,361,553 | |
| -1 | -261,361,553 |
Now, we try dividing 261,361,553 by 3:
261,361,553 ÷ 3 = 87,120,517.6667
If the quotient is a whole number, then 3 and 87,120,517.6667 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 | 261,361,553 | |
| -1 | -261,361,553 |
Let's try dividing by 4:
261,361,553 ÷ 4 = 65,340,388.25
If the quotient is a whole number, then 4 and 65,340,388.25 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 | 261,361,553 | |
| -1 | 261,361,553 |
If you did it right, you will end up with this table:
| 1 | 17 | 97 | 353 | 449 | 1,649 | 6,001 | 7,633 | 34,241 | 43,553 | 158,497 | 582,097 | 740,401 | 2,694,449 | 15,374,209 | 261,361,553 |
| -1 | -17 | -97 | -353 | -449 | -1,649 | -6,001 | -7,633 | -34,241 | -43,553 | -158,497 | -582,097 | -740,401 | -2,694,449 | -15,374,209 | -261,361,553 |
Here are some more numbers to try:
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