A:
Positive:
1 x 204244255 x 40848857 x 291777525 x 81697735 x 58355549 x 416825175 x 116711245 x 833651225 x 16673
Negative:
-1 x -20424425-5 x -4084885-7 x -2917775-25 x -816977-35 x -583555-49 x -416825-175 x -116711-245 x -83365-1225 x -16673
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 20,424,425, 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 | 20,424,425 | |
| -1 | -20,424,425 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,424,425.
Example:
1 x 20,424,425 = 20,424,425
and
-1 x -20,424,425 = 20,424,425
Notice both answers equal 20,424,425
With that explanation out of the way, let's continue. Next, we take the number 20,424,425 and divide it by 2:
20,424,425 ÷ 2 = 10,212,212.5
If the quotient is a whole number, then 2 and 10,212,212.5 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 | 20,424,425 | |
| -1 | -20,424,425 |
Now, we try dividing 20,424,425 by 3:
20,424,425 ÷ 3 = 6,808,141.6667
If the quotient is a whole number, then 3 and 6,808,141.6667 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 | 20,424,425 | |
| -1 | -20,424,425 |
Let's try dividing by 4:
20,424,425 ÷ 4 = 5,106,106.25
If the quotient is a whole number, then 4 and 5,106,106.25 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 | 20,424,425 | |
| -1 | 20,424,425 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 49 | 175 | 245 | 1,225 | 16,673 | 83,365 | 116,711 | 416,825 | 583,555 | 816,977 | 2,917,775 | 4,084,885 | 20,424,425 |
| -1 | -5 | -7 | -25 | -35 | -49 | -175 | -245 | -1,225 | -16,673 | -83,365 | -116,711 | -416,825 | -583,555 | -816,977 | -2,917,775 | -4,084,885 | -20,424,425 |
Here are some more numbers to try:
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