A:
Positive:
1 x 172000917 x 10117723 x 7478353 x 3245383 x 20723391 x 4399901 x 19091219 x 1411
Negative:
-1 x -1720009-17 x -101177-23 x -74783-53 x -32453-83 x -20723-391 x -4399-901 x -1909-1219 x -1411
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 1,720,009, 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 | 1,720,009 | |
| -1 | -1,720,009 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,720,009.
Example:
1 x 1,720,009 = 1,720,009
and
-1 x -1,720,009 = 1,720,009
Notice both answers equal 1,720,009
With that explanation out of the way, let's continue. Next, we take the number 1,720,009 and divide it by 2:
1,720,009 ÷ 2 = 860,004.5
If the quotient is a whole number, then 2 and 860,004.5 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 | 1,720,009 | |
| -1 | -1,720,009 |
Now, we try dividing 1,720,009 by 3:
1,720,009 ÷ 3 = 573,336.3333
If the quotient is a whole number, then 3 and 573,336.3333 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 | 1,720,009 | |
| -1 | -1,720,009 |
Let's try dividing by 4:
1,720,009 ÷ 4 = 430,002.25
If the quotient is a whole number, then 4 and 430,002.25 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 | 1,720,009 | |
| -1 | 1,720,009 |
If you did it right, you will end up with this table:
| 1 | 17 | 23 | 53 | 83 | 391 | 901 | 1,219 | 1,411 | 1,909 | 4,399 | 20,723 | 32,453 | 74,783 | 101,177 | 1,720,009 |
| -1 | -17 | -23 | -53 | -83 | -391 | -901 | -1,219 | -1,411 | -1,909 | -4,399 | -20,723 | -32,453 | -74,783 | -101,177 | -1,720,009 |
Here are some more numbers to try:
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