A:
Positive:
1 x 1968463913 x 151420361 x 322699103 x 191113241 x 81679793 x 248231339 x 147013133 x 6283
Negative:
-1 x -19684639-13 x -1514203-61 x -322699-103 x -191113-241 x -81679-793 x -24823-1339 x -14701-3133 x -6283
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 19,684,639, 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 | 19,684,639 | |
| -1 | -19,684,639 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,684,639.
Example:
1 x 19,684,639 = 19,684,639
and
-1 x -19,684,639 = 19,684,639
Notice both answers equal 19,684,639
With that explanation out of the way, let's continue. Next, we take the number 19,684,639 and divide it by 2:
19,684,639 ÷ 2 = 9,842,319.5
If the quotient is a whole number, then 2 and 9,842,319.5 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 | 19,684,639 | |
| -1 | -19,684,639 |
Now, we try dividing 19,684,639 by 3:
19,684,639 ÷ 3 = 6,561,546.3333
If the quotient is a whole number, then 3 and 6,561,546.3333 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 | 19,684,639 | |
| -1 | -19,684,639 |
Let's try dividing by 4:
19,684,639 ÷ 4 = 4,921,159.75
If the quotient is a whole number, then 4 and 4,921,159.75 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 | 19,684,639 | |
| -1 | 19,684,639 |
If you did it right, you will end up with this table:
| 1 | 13 | 61 | 103 | 241 | 793 | 1,339 | 3,133 | 6,283 | 14,701 | 24,823 | 81,679 | 191,113 | 322,699 | 1,514,203 | 19,684,639 |
| -1 | -13 | -61 | -103 | -241 | -793 | -1,339 | -3,133 | -6,283 | -14,701 | -24,823 | -81,679 | -191,113 | -322,699 | -1,514,203 | -19,684,639 |
Here are some more numbers to try:
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