A:
Positive:
1 x 208400155 x 41680037 x 297714535 x 59542967 x 311045335 x 62209469 x 444352345 x 8887
Negative:
-1 x -20840015-5 x -4168003-7 x -2977145-35 x -595429-67 x -311045-335 x -62209-469 x -44435-2345 x -8887
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 20,840,015, 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 | 20,840,015 | |
| -1 | -20,840,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,840,015.
Example:
1 x 20,840,015 = 20,840,015
and
-1 x -20,840,015 = 20,840,015
Notice both answers equal 20,840,015
With that explanation out of the way, let's continue. Next, we take the number 20,840,015 and divide it by 2:
20,840,015 ÷ 2 = 10,420,007.5
If the quotient is a whole number, then 2 and 10,420,007.5 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 | 20,840,015 | |
| -1 | -20,840,015 |
Now, we try dividing 20,840,015 by 3:
20,840,015 ÷ 3 = 6,946,671.6667
If the quotient is a whole number, then 3 and 6,946,671.6667 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 | 20,840,015 | |
| -1 | -20,840,015 |
Let's try dividing by 4:
20,840,015 ÷ 4 = 5,210,003.75
If the quotient is a whole number, then 4 and 5,210,003.75 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 | 20,840,015 | |
| -1 | 20,840,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 67 | 335 | 469 | 2,345 | 8,887 | 44,435 | 62,209 | 311,045 | 595,429 | 2,977,145 | 4,168,003 | 20,840,015 |
| -1 | -5 | -7 | -35 | -67 | -335 | -469 | -2,345 | -8,887 | -44,435 | -62,209 | -311,045 | -595,429 | -2,977,145 | -4,168,003 | -20,840,015 |
Here are some more numbers to try:
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