A:
Positive:
1 x 192369055 x 384738189 x 216145139 x 138395311 x 61855445 x 43229695 x 276791555 x 12371
Negative:
-1 x -19236905-5 x -3847381-89 x -216145-139 x -138395-311 x -61855-445 x -43229-695 x -27679-1555 x -12371
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 19,236,905, 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 | 19,236,905 | |
| -1 | -19,236,905 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,236,905.
Example:
1 x 19,236,905 = 19,236,905
and
-1 x -19,236,905 = 19,236,905
Notice both answers equal 19,236,905
With that explanation out of the way, let's continue. Next, we take the number 19,236,905 and divide it by 2:
19,236,905 ÷ 2 = 9,618,452.5
If the quotient is a whole number, then 2 and 9,618,452.5 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 | 19,236,905 | |
| -1 | -19,236,905 |
Now, we try dividing 19,236,905 by 3:
19,236,905 ÷ 3 = 6,412,301.6667
If the quotient is a whole number, then 3 and 6,412,301.6667 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 | 19,236,905 | |
| -1 | -19,236,905 |
Let's try dividing by 4:
19,236,905 ÷ 4 = 4,809,226.25
If the quotient is a whole number, then 4 and 4,809,226.25 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 | 19,236,905 | |
| -1 | 19,236,905 |
If you did it right, you will end up with this table:
| 1 | 5 | 89 | 139 | 311 | 445 | 695 | 1,555 | 12,371 | 27,679 | 43,229 | 61,855 | 138,395 | 216,145 | 3,847,381 | 19,236,905 |
| -1 | -5 | -89 | -139 | -311 | -445 | -695 | -1,555 | -12,371 | -27,679 | -43,229 | -61,855 | -138,395 | -216,145 | -3,847,381 | -19,236,905 |
Here are some more numbers to try:
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