A:
Positive:
1 x 2841721717 x 167160119 x 149564397 x 292961323 x 87979907 x 313311649 x 172331843 x 15419
Negative:
-1 x -28417217-17 x -1671601-19 x -1495643-97 x -292961-323 x -87979-907 x -31331-1649 x -17233-1843 x -15419
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 28,417,217, 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 | 28,417,217 | |
| -1 | -28,417,217 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,417,217.
Example:
1 x 28,417,217 = 28,417,217
and
-1 x -28,417,217 = 28,417,217
Notice both answers equal 28,417,217
With that explanation out of the way, let's continue. Next, we take the number 28,417,217 and divide it by 2:
28,417,217 ÷ 2 = 14,208,608.5
If the quotient is a whole number, then 2 and 14,208,608.5 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 | 28,417,217 | |
| -1 | -28,417,217 |
Now, we try dividing 28,417,217 by 3:
28,417,217 ÷ 3 = 9,472,405.6667
If the quotient is a whole number, then 3 and 9,472,405.6667 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 | 28,417,217 | |
| -1 | -28,417,217 |
Let's try dividing by 4:
28,417,217 ÷ 4 = 7,104,304.25
If the quotient is a whole number, then 4 and 7,104,304.25 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 | 28,417,217 | |
| -1 | 28,417,217 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 97 | 323 | 907 | 1,649 | 1,843 | 15,419 | 17,233 | 31,331 | 87,979 | 292,961 | 1,495,643 | 1,671,601 | 28,417,217 |
| -1 | -17 | -19 | -97 | -323 | -907 | -1,649 | -1,843 | -15,419 | -17,233 | -31,331 | -87,979 | -292,961 | -1,495,643 | -1,671,601 | -28,417,217 |
Here are some more numbers to try:
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