A:
Positive:
1 x 213422455 x 426844971 x 30059579 x 270155355 x 60119395 x 54031761 x 280453805 x 5609
Negative:
-1 x -21342245-5 x -4268449-71 x -300595-79 x -270155-355 x -60119-395 x -54031-761 x -28045-3805 x -5609
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 21,342,245, 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 | 21,342,245 | |
| -1 | -21,342,245 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,342,245.
Example:
1 x 21,342,245 = 21,342,245
and
-1 x -21,342,245 = 21,342,245
Notice both answers equal 21,342,245
With that explanation out of the way, let's continue. Next, we take the number 21,342,245 and divide it by 2:
21,342,245 ÷ 2 = 10,671,122.5
If the quotient is a whole number, then 2 and 10,671,122.5 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 | 21,342,245 | |
| -1 | -21,342,245 |
Now, we try dividing 21,342,245 by 3:
21,342,245 ÷ 3 = 7,114,081.6667
If the quotient is a whole number, then 3 and 7,114,081.6667 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 | 21,342,245 | |
| -1 | -21,342,245 |
Let's try dividing by 4:
21,342,245 ÷ 4 = 5,335,561.25
If the quotient is a whole number, then 4 and 5,335,561.25 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 | 21,342,245 | |
| -1 | 21,342,245 |
If you did it right, you will end up with this table:
| 1 | 5 | 71 | 79 | 355 | 395 | 761 | 3,805 | 5,609 | 28,045 | 54,031 | 60,119 | 270,155 | 300,595 | 4,268,449 | 21,342,245 |
| -1 | -5 | -71 | -79 | -355 | -395 | -761 | -3,805 | -5,609 | -28,045 | -54,031 | -60,119 | -270,155 | -300,595 | -4,268,449 | -21,342,245 |
Here are some more numbers to try:
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