A:
Positive:
1 x 216220555 x 43244117 x 308886513 x 166323535 x 61777365 x 33264791 x 237605455 x 47521
Negative:
-1 x -21622055-5 x -4324411-7 x -3088865-13 x -1663235-35 x -617773-65 x -332647-91 x -237605-455 x -47521
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 21,622,055, 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 | 21,622,055 | |
| -1 | -21,622,055 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,622,055.
Example:
1 x 21,622,055 = 21,622,055
and
-1 x -21,622,055 = 21,622,055
Notice both answers equal 21,622,055
With that explanation out of the way, let's continue. Next, we take the number 21,622,055 and divide it by 2:
21,622,055 ÷ 2 = 10,811,027.5
If the quotient is a whole number, then 2 and 10,811,027.5 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 | 21,622,055 | |
| -1 | -21,622,055 |
Now, we try dividing 21,622,055 by 3:
21,622,055 ÷ 3 = 7,207,351.6667
If the quotient is a whole number, then 3 and 7,207,351.6667 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 | 21,622,055 | |
| -1 | -21,622,055 |
Let's try dividing by 4:
21,622,055 ÷ 4 = 5,405,513.75
If the quotient is a whole number, then 4 and 5,405,513.75 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 | 21,622,055 | |
| -1 | 21,622,055 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 65 | 91 | 455 | 47,521 | 237,605 | 332,647 | 617,773 | 1,663,235 | 3,088,865 | 4,324,411 | 21,622,055 |
| -1 | -5 | -7 | -13 | -35 | -65 | -91 | -455 | -47,521 | -237,605 | -332,647 | -617,773 | -1,663,235 | -3,088,865 | -4,324,411 | -21,622,055 |
Here are some more numbers to try:
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