A:
Positive:
1 x 1997515311 x 181592317 x 117500937 x 539869187 x 106819407 x 49079629 x 317572887 x 6919
Negative:
-1 x -19975153-11 x -1815923-17 x -1175009-37 x -539869-187 x -106819-407 x -49079-629 x -31757-2887 x -6919
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 19,975,153, 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 | 19,975,153 | |
| -1 | -19,975,153 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,975,153.
Example:
1 x 19,975,153 = 19,975,153
and
-1 x -19,975,153 = 19,975,153
Notice both answers equal 19,975,153
With that explanation out of the way, let's continue. Next, we take the number 19,975,153 and divide it by 2:
19,975,153 ÷ 2 = 9,987,576.5
If the quotient is a whole number, then 2 and 9,987,576.5 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 | 19,975,153 | |
| -1 | -19,975,153 |
Now, we try dividing 19,975,153 by 3:
19,975,153 ÷ 3 = 6,658,384.3333
If the quotient is a whole number, then 3 and 6,658,384.3333 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 | 19,975,153 | |
| -1 | -19,975,153 |
Let's try dividing by 4:
19,975,153 ÷ 4 = 4,993,788.25
If the quotient is a whole number, then 4 and 4,993,788.25 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 | 19,975,153 | |
| -1 | 19,975,153 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 37 | 187 | 407 | 629 | 2,887 | 6,919 | 31,757 | 49,079 | 106,819 | 539,869 | 1,175,009 | 1,815,923 | 19,975,153 |
| -1 | -11 | -17 | -37 | -187 | -407 | -629 | -2,887 | -6,919 | -31,757 | -49,079 | -106,819 | -539,869 | -1,175,009 | -1,815,923 | -19,975,153 |
Here are some more numbers to try:
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