A:
Positive:
1 x 2152140255 x 4304280513 x 1655492525 x 860856165 x 3310985191 x 1126775325 x 662197955 x 2253552483 x 866753467 x 620754775 x 4507112415 x 17335
Negative:
-1 x -215214025-5 x -43042805-13 x -16554925-25 x -8608561-65 x -3310985-191 x -1126775-325 x -662197-955 x -225355-2483 x -86675-3467 x -62075-4775 x -45071-12415 x -17335
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 215,214,025, 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 | 215,214,025 | |
| -1 | -215,214,025 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 215,214,025.
Example:
1 x 215,214,025 = 215,214,025
and
-1 x -215,214,025 = 215,214,025
Notice both answers equal 215,214,025
With that explanation out of the way, let's continue. Next, we take the number 215,214,025 and divide it by 2:
215,214,025 ÷ 2 = 107,607,012.5
If the quotient is a whole number, then 2 and 107,607,012.5 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 | 215,214,025 | |
| -1 | -215,214,025 |
Now, we try dividing 215,214,025 by 3:
215,214,025 ÷ 3 = 71,738,008.3333
If the quotient is a whole number, then 3 and 71,738,008.3333 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 | 215,214,025 | |
| -1 | -215,214,025 |
Let's try dividing by 4:
215,214,025 ÷ 4 = 53,803,506.25
If the quotient is a whole number, then 4 and 53,803,506.25 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 | 215,214,025 | |
| -1 | 215,214,025 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 65 | 191 | 325 | 955 | 2,483 | 3,467 | 4,775 | 12,415 | 17,335 | 45,071 | 62,075 | 86,675 | 225,355 | 662,197 | 1,126,775 | 3,310,985 | 8,608,561 | 16,554,925 | 43,042,805 | 215,214,025 |
| -1 | -5 | -13 | -25 | -65 | -191 | -325 | -955 | -2,483 | -3,467 | -4,775 | -12,415 | -17,335 | -45,071 | -62,075 | -86,675 | -225,355 | -662,197 | -1,126,775 | -3,310,985 | -8,608,561 | -16,554,925 | -43,042,805 | -215,214,025 |
Here are some more numbers to try:
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