A:
Positive:
1 x 17227217 x 24610311 x 15661113 x 13251777 x 2237391 x 18931143 x 120471001 x 1721
Negative:
-1 x -1722721-7 x -246103-11 x -156611-13 x -132517-77 x -22373-91 x -18931-143 x -12047-1001 x -1721
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 1,722,721, 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 | 1,722,721 | |
| -1 | -1,722,721 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,722,721.
Example:
1 x 1,722,721 = 1,722,721
and
-1 x -1,722,721 = 1,722,721
Notice both answers equal 1,722,721
With that explanation out of the way, let's continue. Next, we take the number 1,722,721 and divide it by 2:
1,722,721 ÷ 2 = 861,360.5
If the quotient is a whole number, then 2 and 861,360.5 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 | 1,722,721 | |
| -1 | -1,722,721 |
Now, we try dividing 1,722,721 by 3:
1,722,721 ÷ 3 = 574,240.3333
If the quotient is a whole number, then 3 and 574,240.3333 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 | 1,722,721 | |
| -1 | -1,722,721 |
Let's try dividing by 4:
1,722,721 ÷ 4 = 430,680.25
If the quotient is a whole number, then 4 and 430,680.25 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 | 1,722,721 | |
| -1 | 1,722,721 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 13 | 77 | 91 | 143 | 1,001 | 1,721 | 12,047 | 18,931 | 22,373 | 132,517 | 156,611 | 246,103 | 1,722,721 |
| -1 | -7 | -11 | -13 | -77 | -91 | -143 | -1,001 | -1,721 | -12,047 | -18,931 | -22,373 | -132,517 | -156,611 | -246,103 | -1,722,721 |
Here are some more numbers to try:
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