A:
Positive:
1 x 211410437 x 302014911 x 192191377 x 274559463 x 45661593 x 356513241 x 65234151 x 5093
Negative:
-1 x -21141043-7 x -3020149-11 x -1921913-77 x -274559-463 x -45661-593 x -35651-3241 x -6523-4151 x -5093
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 21,141,043, 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 | 21,141,043 | |
| -1 | -21,141,043 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,141,043.
Example:
1 x 21,141,043 = 21,141,043
and
-1 x -21,141,043 = 21,141,043
Notice both answers equal 21,141,043
With that explanation out of the way, let's continue. Next, we take the number 21,141,043 and divide it by 2:
21,141,043 ÷ 2 = 10,570,521.5
If the quotient is a whole number, then 2 and 10,570,521.5 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 | 21,141,043 | |
| -1 | -21,141,043 |
Now, we try dividing 21,141,043 by 3:
21,141,043 ÷ 3 = 7,047,014.3333
If the quotient is a whole number, then 3 and 7,047,014.3333 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 | 21,141,043 | |
| -1 | -21,141,043 |
Let's try dividing by 4:
21,141,043 ÷ 4 = 5,285,260.75
If the quotient is a whole number, then 4 and 5,285,260.75 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 | 21,141,043 | |
| -1 | 21,141,043 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 463 | 593 | 3,241 | 4,151 | 5,093 | 6,523 | 35,651 | 45,661 | 274,559 | 1,921,913 | 3,020,149 | 21,141,043 |
| -1 | -7 | -11 | -77 | -463 | -593 | -3,241 | -4,151 | -5,093 | -6,523 | -35,651 | -45,661 | -274,559 | -1,921,913 | -3,020,149 | -21,141,043 |
Here are some more numbers to try:
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