A:
Positive:
1 x 214138337 x 305911949 x 437017149 x 143717343 x 62431419 x 511071043 x 205312933 x 7301
Negative:
-1 x -21413833-7 x -3059119-49 x -437017-149 x -143717-343 x -62431-419 x -51107-1043 x -20531-2933 x -7301
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 21,413,833, 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 | 21,413,833 | |
| -1 | -21,413,833 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,413,833.
Example:
1 x 21,413,833 = 21,413,833
and
-1 x -21,413,833 = 21,413,833
Notice both answers equal 21,413,833
With that explanation out of the way, let's continue. Next, we take the number 21,413,833 and divide it by 2:
21,413,833 ÷ 2 = 10,706,916.5
If the quotient is a whole number, then 2 and 10,706,916.5 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 | 21,413,833 | |
| -1 | -21,413,833 |
Now, we try dividing 21,413,833 by 3:
21,413,833 ÷ 3 = 7,137,944.3333
If the quotient is a whole number, then 3 and 7,137,944.3333 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 | 21,413,833 | |
| -1 | -21,413,833 |
Let's try dividing by 4:
21,413,833 ÷ 4 = 5,353,458.25
If the quotient is a whole number, then 4 and 5,353,458.25 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 | 21,413,833 | |
| -1 | 21,413,833 |
If you did it right, you will end up with this table:
| 1 | 7 | 49 | 149 | 343 | 419 | 1,043 | 2,933 | 7,301 | 20,531 | 51,107 | 62,431 | 143,717 | 437,017 | 3,059,119 | 21,413,833 |
| -1 | -7 | -49 | -149 | -343 | -419 | -1,043 | -2,933 | -7,301 | -20,531 | -51,107 | -62,431 | -143,717 | -437,017 | -3,059,119 | -21,413,833 |
Here are some more numbers to try:
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