A:
Positive:
1 x 192778855 x 385557711 x 175253555 x 350507269 x 716651303 x 147951345 x 143332959 x 6515
Negative:
-1 x -19277885-5 x -3855577-11 x -1752535-55 x -350507-269 x -71665-1303 x -14795-1345 x -14333-2959 x -6515
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 19,277,885, 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 | 19,277,885 | |
| -1 | -19,277,885 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,277,885.
Example:
1 x 19,277,885 = 19,277,885
and
-1 x -19,277,885 = 19,277,885
Notice both answers equal 19,277,885
With that explanation out of the way, let's continue. Next, we take the number 19,277,885 and divide it by 2:
19,277,885 ÷ 2 = 9,638,942.5
If the quotient is a whole number, then 2 and 9,638,942.5 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 | 19,277,885 | |
| -1 | -19,277,885 |
Now, we try dividing 19,277,885 by 3:
19,277,885 ÷ 3 = 6,425,961.6667
If the quotient is a whole number, then 3 and 6,425,961.6667 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 | 19,277,885 | |
| -1 | -19,277,885 |
Let's try dividing by 4:
19,277,885 ÷ 4 = 4,819,471.25
If the quotient is a whole number, then 4 and 4,819,471.25 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 | 19,277,885 | |
| -1 | 19,277,885 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 269 | 1,303 | 1,345 | 2,959 | 6,515 | 14,333 | 14,795 | 71,665 | 350,507 | 1,752,535 | 3,855,577 | 19,277,885 |
| -1 | -5 | -11 | -55 | -269 | -1,303 | -1,345 | -2,959 | -6,515 | -14,333 | -14,795 | -71,665 | -350,507 | -1,752,535 | -3,855,577 | -19,277,885 |
Here are some more numbers to try:
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