A:
Positive:
1 x 2455045155 x 4910090341 x 5987915109 x 2252335205 x 1197583545 x 4504674469 x 5493510987 x 22345
Negative:
-1 x -245504515-5 x -49100903-41 x -5987915-109 x -2252335-205 x -1197583-545 x -450467-4469 x -54935-10987 x -22345
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 245,504,515, 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 | 245,504,515 | |
| -1 | -245,504,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 245,504,515.
Example:
1 x 245,504,515 = 245,504,515
and
-1 x -245,504,515 = 245,504,515
Notice both answers equal 245,504,515
With that explanation out of the way, let's continue. Next, we take the number 245,504,515 and divide it by 2:
245,504,515 ÷ 2 = 122,752,257.5
If the quotient is a whole number, then 2 and 122,752,257.5 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 | 245,504,515 | |
| -1 | -245,504,515 |
Now, we try dividing 245,504,515 by 3:
245,504,515 ÷ 3 = 81,834,838.3333
If the quotient is a whole number, then 3 and 81,834,838.3333 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 | 245,504,515 | |
| -1 | -245,504,515 |
Let's try dividing by 4:
245,504,515 ÷ 4 = 61,376,128.75
If the quotient is a whole number, then 4 and 61,376,128.75 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 | 245,504,515 | |
| -1 | 245,504,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 109 | 205 | 545 | 4,469 | 10,987 | 22,345 | 54,935 | 450,467 | 1,197,583 | 2,252,335 | 5,987,915 | 49,100,903 | 245,504,515 |
| -1 | -5 | -41 | -109 | -205 | -545 | -4,469 | -10,987 | -22,345 | -54,935 | -450,467 | -1,197,583 | -2,252,335 | -5,987,915 | -49,100,903 | -245,504,515 |
Here are some more numbers to try:
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