A:
Positive:
1 x 172217155 x 34443437 x 246024535 x 49204943 x 400505215 x 80101301 x 572151505 x 11443
Negative:
-1 x -17221715-5 x -3444343-7 x -2460245-35 x -492049-43 x -400505-215 x -80101-301 x -57215-1505 x -11443
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 17,221,715, 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 | 17,221,715 | |
| -1 | -17,221,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 17,221,715.
Example:
1 x 17,221,715 = 17,221,715
and
-1 x -17,221,715 = 17,221,715
Notice both answers equal 17,221,715
With that explanation out of the way, let's continue. Next, we take the number 17,221,715 and divide it by 2:
17,221,715 ÷ 2 = 8,610,857.5
If the quotient is a whole number, then 2 and 8,610,857.5 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 | 17,221,715 | |
| -1 | -17,221,715 |
Now, we try dividing 17,221,715 by 3:
17,221,715 ÷ 3 = 5,740,571.6667
If the quotient is a whole number, then 3 and 5,740,571.6667 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 | 17,221,715 | |
| -1 | -17,221,715 |
Let's try dividing by 4:
17,221,715 ÷ 4 = 4,305,428.75
If the quotient is a whole number, then 4 and 4,305,428.75 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 | 17,221,715 | |
| -1 | 17,221,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 43 | 215 | 301 | 1,505 | 11,443 | 57,215 | 80,101 | 400,505 | 492,049 | 2,460,245 | 3,444,343 | 17,221,715 |
| -1 | -5 | -7 | -35 | -43 | -215 | -301 | -1,505 | -11,443 | -57,215 | -80,101 | -400,505 | -492,049 | -2,460,245 | -3,444,343 | -17,221,715 |
Here are some more numbers to try:
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