A:
Positive:
1 x 217038017 x 310054341 x 52936147 x 461783287 x 75623329 x 659691609 x 134891927 x 11263
Negative:
-1 x -21703801-7 x -3100543-41 x -529361-47 x -461783-287 x -75623-329 x -65969-1609 x -13489-1927 x -11263
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 21,703,801, 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 | 21,703,801 | |
| -1 | -21,703,801 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,703,801.
Example:
1 x 21,703,801 = 21,703,801
and
-1 x -21,703,801 = 21,703,801
Notice both answers equal 21,703,801
With that explanation out of the way, let's continue. Next, we take the number 21,703,801 and divide it by 2:
21,703,801 ÷ 2 = 10,851,900.5
If the quotient is a whole number, then 2 and 10,851,900.5 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 | 21,703,801 | |
| -1 | -21,703,801 |
Now, we try dividing 21,703,801 by 3:
21,703,801 ÷ 3 = 7,234,600.3333
If the quotient is a whole number, then 3 and 7,234,600.3333 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 | 21,703,801 | |
| -1 | -21,703,801 |
Let's try dividing by 4:
21,703,801 ÷ 4 = 5,425,950.25
If the quotient is a whole number, then 4 and 5,425,950.25 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 | 21,703,801 | |
| -1 | 21,703,801 |
If you did it right, you will end up with this table:
| 1 | 7 | 41 | 47 | 287 | 329 | 1,609 | 1,927 | 11,263 | 13,489 | 65,969 | 75,623 | 461,783 | 529,361 | 3,100,543 | 21,703,801 |
| -1 | -7 | -41 | -47 | -287 | -329 | -1,609 | -1,927 | -11,263 | -13,489 | -65,969 | -75,623 | -461,783 | -529,361 | -3,100,543 | -21,703,801 |
Here are some more numbers to try:
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