A:
Positive:
1 x 208941555 x 417883131 x 674005155 x 134801163 x 128185815 x 25637827 x 252654135 x 5053
Negative:
-1 x -20894155-5 x -4178831-31 x -674005-155 x -134801-163 x -128185-815 x -25637-827 x -25265-4135 x -5053
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 20,894,155, 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 | 20,894,155 | |
| -1 | -20,894,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,894,155.
Example:
1 x 20,894,155 = 20,894,155
and
-1 x -20,894,155 = 20,894,155
Notice both answers equal 20,894,155
With that explanation out of the way, let's continue. Next, we take the number 20,894,155 and divide it by 2:
20,894,155 ÷ 2 = 10,447,077.5
If the quotient is a whole number, then 2 and 10,447,077.5 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 | 20,894,155 | |
| -1 | -20,894,155 |
Now, we try dividing 20,894,155 by 3:
20,894,155 ÷ 3 = 6,964,718.3333
If the quotient is a whole number, then 3 and 6,964,718.3333 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 | 20,894,155 | |
| -1 | -20,894,155 |
Let's try dividing by 4:
20,894,155 ÷ 4 = 5,223,538.75
If the quotient is a whole number, then 4 and 5,223,538.75 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 | 20,894,155 | |
| -1 | 20,894,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 163 | 815 | 827 | 4,135 | 5,053 | 25,265 | 25,637 | 128,185 | 134,801 | 674,005 | 4,178,831 | 20,894,155 |
| -1 | -5 | -31 | -155 | -163 | -815 | -827 | -4,135 | -5,053 | -25,265 | -25,637 | -128,185 | -134,801 | -674,005 | -4,178,831 | -20,894,155 |
Here are some more numbers to try:
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