A:
Positive:
1 x 208865655 x 41773137 x 298379535 x 59675947 x 444395235 x 88879329 x 634851645 x 12697
Negative:
-1 x -20886565-5 x -4177313-7 x -2983795-35 x -596759-47 x -444395-235 x -88879-329 x -63485-1645 x -12697
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 20,886,565, 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 | 20,886,565 | |
| -1 | -20,886,565 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,886,565.
Example:
1 x 20,886,565 = 20,886,565
and
-1 x -20,886,565 = 20,886,565
Notice both answers equal 20,886,565
With that explanation out of the way, let's continue. Next, we take the number 20,886,565 and divide it by 2:
20,886,565 ÷ 2 = 10,443,282.5
If the quotient is a whole number, then 2 and 10,443,282.5 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 | 20,886,565 | |
| -1 | -20,886,565 |
Now, we try dividing 20,886,565 by 3:
20,886,565 ÷ 3 = 6,962,188.3333
If the quotient is a whole number, then 3 and 6,962,188.3333 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 | 20,886,565 | |
| -1 | -20,886,565 |
Let's try dividing by 4:
20,886,565 ÷ 4 = 5,221,641.25
If the quotient is a whole number, then 4 and 5,221,641.25 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 | 20,886,565 | |
| -1 | 20,886,565 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 47 | 235 | 329 | 1,645 | 12,697 | 63,485 | 88,879 | 444,395 | 596,759 | 2,983,795 | 4,177,313 | 20,886,565 |
| -1 | -5 | -7 | -35 | -47 | -235 | -329 | -1,645 | -12,697 | -63,485 | -88,879 | -444,395 | -596,759 | -2,983,795 | -4,177,313 | -20,886,565 |
Here are some more numbers to try:
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