A:
Positive:
1 x 204204355 x 40840877 x 291720523 x 88784535 x 583441115 x 177569161 x 126835805 x 25367
Negative:
-1 x -20420435-5 x -4084087-7 x -2917205-23 x -887845-35 x -583441-115 x -177569-161 x -126835-805 x -25367
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 20,420,435, 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 | 20,420,435 | |
| -1 | -20,420,435 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,420,435.
Example:
1 x 20,420,435 = 20,420,435
and
-1 x -20,420,435 = 20,420,435
Notice both answers equal 20,420,435
With that explanation out of the way, let's continue. Next, we take the number 20,420,435 and divide it by 2:
20,420,435 ÷ 2 = 10,210,217.5
If the quotient is a whole number, then 2 and 10,210,217.5 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 | 20,420,435 | |
| -1 | -20,420,435 |
Now, we try dividing 20,420,435 by 3:
20,420,435 ÷ 3 = 6,806,811.6667
If the quotient is a whole number, then 3 and 6,806,811.6667 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 | 20,420,435 | |
| -1 | -20,420,435 |
Let's try dividing by 4:
20,420,435 ÷ 4 = 5,105,108.75
If the quotient is a whole number, then 4 and 5,105,108.75 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 | 20,420,435 | |
| -1 | 20,420,435 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 23 | 35 | 115 | 161 | 805 | 25,367 | 126,835 | 177,569 | 583,441 | 887,845 | 2,917,205 | 4,084,087 | 20,420,435 |
| -1 | -5 | -7 | -23 | -35 | -115 | -161 | -805 | -25,367 | -126,835 | -177,569 | -583,441 | -887,845 | -2,917,205 | -4,084,087 | -20,420,435 |
Here are some more numbers to try:
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