A:
Positive:
1 x 188958917 x 269941317 x 111152397 x 194803119 x 158789679 x 278291637 x 115431649 x 11459
Negative:
-1 x -18895891-7 x -2699413-17 x -1111523-97 x -194803-119 x -158789-679 x -27829-1637 x -11543-1649 x -11459
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 18,895,891, 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 | 18,895,891 | |
| -1 | -18,895,891 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,895,891.
Example:
1 x 18,895,891 = 18,895,891
and
-1 x -18,895,891 = 18,895,891
Notice both answers equal 18,895,891
With that explanation out of the way, let's continue. Next, we take the number 18,895,891 and divide it by 2:
18,895,891 ÷ 2 = 9,447,945.5
If the quotient is a whole number, then 2 and 9,447,945.5 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 | 18,895,891 | |
| -1 | -18,895,891 |
Now, we try dividing 18,895,891 by 3:
18,895,891 ÷ 3 = 6,298,630.3333
If the quotient is a whole number, then 3 and 6,298,630.3333 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 | 18,895,891 | |
| -1 | -18,895,891 |
Let's try dividing by 4:
18,895,891 ÷ 4 = 4,723,972.75
If the quotient is a whole number, then 4 and 4,723,972.75 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 | 18,895,891 | |
| -1 | 18,895,891 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 97 | 119 | 679 | 1,637 | 1,649 | 11,459 | 11,543 | 27,829 | 158,789 | 194,803 | 1,111,523 | 2,699,413 | 18,895,891 |
| -1 | -7 | -17 | -97 | -119 | -679 | -1,637 | -1,649 | -11,459 | -11,543 | -27,829 | -158,789 | -194,803 | -1,111,523 | -2,699,413 | -18,895,891 |
Here are some more numbers to try:
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