A:
Positive:
1 x 2103412119 x 110705923 x 914527127 x 165623379 x 55499437 x 481332413 x 87172921 x 7201
Negative:
-1 x -21034121-19 x -1107059-23 x -914527-127 x -165623-379 x -55499-437 x -48133-2413 x -8717-2921 x -7201
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 21,034,121, 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 | 21,034,121 | |
| -1 | -21,034,121 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,034,121.
Example:
1 x 21,034,121 = 21,034,121
and
-1 x -21,034,121 = 21,034,121
Notice both answers equal 21,034,121
With that explanation out of the way, let's continue. Next, we take the number 21,034,121 and divide it by 2:
21,034,121 ÷ 2 = 10,517,060.5
If the quotient is a whole number, then 2 and 10,517,060.5 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 | 21,034,121 | |
| -1 | -21,034,121 |
Now, we try dividing 21,034,121 by 3:
21,034,121 ÷ 3 = 7,011,373.6667
If the quotient is a whole number, then 3 and 7,011,373.6667 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 | 21,034,121 | |
| -1 | -21,034,121 |
Let's try dividing by 4:
21,034,121 ÷ 4 = 5,258,530.25
If the quotient is a whole number, then 4 and 5,258,530.25 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 | 21,034,121 | |
| -1 | 21,034,121 |
If you did it right, you will end up with this table:
| 1 | 19 | 23 | 127 | 379 | 437 | 2,413 | 2,921 | 7,201 | 8,717 | 48,133 | 55,499 | 165,623 | 914,527 | 1,107,059 | 21,034,121 |
| -1 | -19 | -23 | -127 | -379 | -437 | -2,413 | -2,921 | -7,201 | -8,717 | -48,133 | -55,499 | -165,623 | -914,527 | -1,107,059 | -21,034,121 |
Here are some more numbers to try:
Try the factor calculator