A:
Positive:
1 x 196474855 x 392949711 x 178613513 x 151134555 x 35722765 x 302269143 x 137395715 x 27479
Negative:
-1 x -19647485-5 x -3929497-11 x -1786135-13 x -1511345-55 x -357227-65 x -302269-143 x -137395-715 x -27479
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 19,647,485, 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 | 19,647,485 | |
| -1 | -19,647,485 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,647,485.
Example:
1 x 19,647,485 = 19,647,485
and
-1 x -19,647,485 = 19,647,485
Notice both answers equal 19,647,485
With that explanation out of the way, let's continue. Next, we take the number 19,647,485 and divide it by 2:
19,647,485 ÷ 2 = 9,823,742.5
If the quotient is a whole number, then 2 and 9,823,742.5 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 | 19,647,485 | |
| -1 | -19,647,485 |
Now, we try dividing 19,647,485 by 3:
19,647,485 ÷ 3 = 6,549,161.6667
If the quotient is a whole number, then 3 and 6,549,161.6667 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 | 19,647,485 | |
| -1 | -19,647,485 |
Let's try dividing by 4:
19,647,485 ÷ 4 = 4,911,871.25
If the quotient is a whole number, then 4 and 4,911,871.25 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 | 19,647,485 | |
| -1 | 19,647,485 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 13 | 55 | 65 | 143 | 715 | 27,479 | 137,395 | 302,269 | 357,227 | 1,511,345 | 1,786,135 | 3,929,497 | 19,647,485 |
| -1 | -5 | -11 | -13 | -55 | -65 | -143 | -715 | -27,479 | -137,395 | -302,269 | -357,227 | -1,511,345 | -1,786,135 | -3,929,497 | -19,647,485 |
Here are some more numbers to try:
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