A:
Positive:
1 x 22176055 x 44352113 x 17058565 x 34117109 x 20345313 x 7085545 x 40691417 x 1565
Negative:
-1 x -2217605-5 x -443521-13 x -170585-65 x -34117-109 x -20345-313 x -7085-545 x -4069-1417 x -1565
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 2,217,605, 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 | 2,217,605 | |
| -1 | -2,217,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,217,605.
Example:
1 x 2,217,605 = 2,217,605
and
-1 x -2,217,605 = 2,217,605
Notice both answers equal 2,217,605
With that explanation out of the way, let's continue. Next, we take the number 2,217,605 and divide it by 2:
2,217,605 ÷ 2 = 1,108,802.5
If the quotient is a whole number, then 2 and 1,108,802.5 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 | 2,217,605 | |
| -1 | -2,217,605 |
Now, we try dividing 2,217,605 by 3:
2,217,605 ÷ 3 = 739,201.6667
If the quotient is a whole number, then 3 and 739,201.6667 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 | 2,217,605 | |
| -1 | -2,217,605 |
Let's try dividing by 4:
2,217,605 ÷ 4 = 554,401.25
If the quotient is a whole number, then 4 and 554,401.25 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 | 2,217,605 | |
| -1 | 2,217,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 109 | 313 | 545 | 1,417 | 1,565 | 4,069 | 7,085 | 20,345 | 34,117 | 170,585 | 443,521 | 2,217,605 |
| -1 | -5 | -13 | -65 | -109 | -313 | -545 | -1,417 | -1,565 | -4,069 | -7,085 | -20,345 | -34,117 | -170,585 | -443,521 | -2,217,605 |
Here are some more numbers to try:
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