A:
Positive:
1 x 2611622455 x 5223244917 x 1536248573 x 357756585 x 3072497365 x 7155131241 x 2104456205 x 42089
Negative:
-1 x -261162245-5 x -52232449-17 x -15362485-73 x -3577565-85 x -3072497-365 x -715513-1241 x -210445-6205 x -42089
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 261,162,245, 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 | 261,162,245 | |
| -1 | -261,162,245 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 261,162,245.
Example:
1 x 261,162,245 = 261,162,245
and
-1 x -261,162,245 = 261,162,245
Notice both answers equal 261,162,245
With that explanation out of the way, let's continue. Next, we take the number 261,162,245 and divide it by 2:
261,162,245 ÷ 2 = 130,581,122.5
If the quotient is a whole number, then 2 and 130,581,122.5 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 | 261,162,245 | |
| -1 | -261,162,245 |
Now, we try dividing 261,162,245 by 3:
261,162,245 ÷ 3 = 87,054,081.6667
If the quotient is a whole number, then 3 and 87,054,081.6667 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 | 261,162,245 | |
| -1 | -261,162,245 |
Let's try dividing by 4:
261,162,245 ÷ 4 = 65,290,561.25
If the quotient is a whole number, then 4 and 65,290,561.25 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 | 261,162,245 | |
| -1 | 261,162,245 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 73 | 85 | 365 | 1,241 | 6,205 | 42,089 | 210,445 | 715,513 | 3,072,497 | 3,577,565 | 15,362,485 | 52,232,449 | 261,162,245 |
| -1 | -5 | -17 | -73 | -85 | -365 | -1,241 | -6,205 | -42,089 | -210,445 | -715,513 | -3,072,497 | -3,577,565 | -15,362,485 | -52,232,449 | -261,162,245 |
Here are some more numbers to try:
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