A:
Positive:
1 x 194891755 x 389783525 x 77956759 x 33032573 x 266975181 x 107675295 x 66065365 x 53395905 x 215351475 x 132131825 x 106794307 x 4525
Negative:
-1 x -19489175-5 x -3897835-25 x -779567-59 x -330325-73 x -266975-181 x -107675-295 x -66065-365 x -53395-905 x -21535-1475 x -13213-1825 x -10679-4307 x -4525
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 19,489,175, 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 | 19,489,175 | |
| -1 | -19,489,175 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,489,175.
Example:
1 x 19,489,175 = 19,489,175
and
-1 x -19,489,175 = 19,489,175
Notice both answers equal 19,489,175
With that explanation out of the way, let's continue. Next, we take the number 19,489,175 and divide it by 2:
19,489,175 ÷ 2 = 9,744,587.5
If the quotient is a whole number, then 2 and 9,744,587.5 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 | 19,489,175 | |
| -1 | -19,489,175 |
Now, we try dividing 19,489,175 by 3:
19,489,175 ÷ 3 = 6,496,391.6667
If the quotient is a whole number, then 3 and 6,496,391.6667 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 | 19,489,175 | |
| -1 | -19,489,175 |
Let's try dividing by 4:
19,489,175 ÷ 4 = 4,872,293.75
If the quotient is a whole number, then 4 and 4,872,293.75 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 | 19,489,175 | |
| -1 | 19,489,175 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 59 | 73 | 181 | 295 | 365 | 905 | 1,475 | 1,825 | 4,307 | 4,525 | 10,679 | 13,213 | 21,535 | 53,395 | 66,065 | 107,675 | 266,975 | 330,325 | 779,567 | 3,897,835 | 19,489,175 |
| -1 | -5 | -25 | -59 | -73 | -181 | -295 | -365 | -905 | -1,475 | -1,825 | -4,307 | -4,525 | -10,679 | -13,213 | -21,535 | -53,395 | -66,065 | -107,675 | -266,975 | -330,325 | -779,567 | -3,897,835 | -19,489,175 |
Here are some more numbers to try:
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