A:
Positive:
1 x 172157055 x 344314113 x 132428529 x 59364565 x 264857145 x 118729377 x 456651885 x 9133
Negative:
-1 x -17215705-5 x -3443141-13 x -1324285-29 x -593645-65 x -264857-145 x -118729-377 x -45665-1885 x -9133
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 17,215,705, 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 | 17,215,705 | |
| -1 | -17,215,705 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 17,215,705.
Example:
1 x 17,215,705 = 17,215,705
and
-1 x -17,215,705 = 17,215,705
Notice both answers equal 17,215,705
With that explanation out of the way, let's continue. Next, we take the number 17,215,705 and divide it by 2:
17,215,705 ÷ 2 = 8,607,852.5
If the quotient is a whole number, then 2 and 8,607,852.5 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 | 17,215,705 | |
| -1 | -17,215,705 |
Now, we try dividing 17,215,705 by 3:
17,215,705 ÷ 3 = 5,738,568.3333
If the quotient is a whole number, then 3 and 5,738,568.3333 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 | 17,215,705 | |
| -1 | -17,215,705 |
Let's try dividing by 4:
17,215,705 ÷ 4 = 4,303,926.25
If the quotient is a whole number, then 4 and 4,303,926.25 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 | 17,215,705 | |
| -1 | 17,215,705 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 29 | 65 | 145 | 377 | 1,885 | 9,133 | 45,665 | 118,729 | 264,857 | 593,645 | 1,324,285 | 3,443,141 | 17,215,705 |
| -1 | -5 | -13 | -29 | -65 | -145 | -377 | -1,885 | -9,133 | -45,665 | -118,729 | -264,857 | -593,645 | -1,324,285 | -3,443,141 | -17,215,705 |
Here are some more numbers to try:
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