A:
Positive:
1 x 2103253911 x 191204931 x 67846937 x 568447341 x 61679407 x 516771147 x 183371667 x 12617
Negative:
-1 x -21032539-11 x -1912049-31 x -678469-37 x -568447-341 x -61679-407 x -51677-1147 x -18337-1667 x -12617
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 21,032,539, 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 | 21,032,539 | |
| -1 | -21,032,539 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,032,539.
Example:
1 x 21,032,539 = 21,032,539
and
-1 x -21,032,539 = 21,032,539
Notice both answers equal 21,032,539
With that explanation out of the way, let's continue. Next, we take the number 21,032,539 and divide it by 2:
21,032,539 ÷ 2 = 10,516,269.5
If the quotient is a whole number, then 2 and 10,516,269.5 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 | 21,032,539 | |
| -1 | -21,032,539 |
Now, we try dividing 21,032,539 by 3:
21,032,539 ÷ 3 = 7,010,846.3333
If the quotient is a whole number, then 3 and 7,010,846.3333 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 | 21,032,539 | |
| -1 | -21,032,539 |
Let's try dividing by 4:
21,032,539 ÷ 4 = 5,258,134.75
If the quotient is a whole number, then 4 and 5,258,134.75 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 | 21,032,539 | |
| -1 | 21,032,539 |
If you did it right, you will end up with this table:
| 1 | 11 | 31 | 37 | 341 | 407 | 1,147 | 1,667 | 12,617 | 18,337 | 51,677 | 61,679 | 568,447 | 678,469 | 1,912,049 | 21,032,539 |
| -1 | -11 | -31 | -37 | -341 | -407 | -1,147 | -1,667 | -12,617 | -18,337 | -51,677 | -61,679 | -568,447 | -678,469 | -1,912,049 | -21,032,539 |
Here are some more numbers to try:
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