A:
Positive:
1 x 186705197 x 266721729 x 64381149 x 381031203 x 91973343 x 544331421 x 131391877 x 9947
Negative:
-1 x -18670519-7 x -2667217-29 x -643811-49 x -381031-203 x -91973-343 x -54433-1421 x -13139-1877 x -9947
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 18,670,519, 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 | 18,670,519 | |
| -1 | -18,670,519 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,670,519.
Example:
1 x 18,670,519 = 18,670,519
and
-1 x -18,670,519 = 18,670,519
Notice both answers equal 18,670,519
With that explanation out of the way, let's continue. Next, we take the number 18,670,519 and divide it by 2:
18,670,519 ÷ 2 = 9,335,259.5
If the quotient is a whole number, then 2 and 9,335,259.5 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 | 18,670,519 | |
| -1 | -18,670,519 |
Now, we try dividing 18,670,519 by 3:
18,670,519 ÷ 3 = 6,223,506.3333
If the quotient is a whole number, then 3 and 6,223,506.3333 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 | 18,670,519 | |
| -1 | -18,670,519 |
Let's try dividing by 4:
18,670,519 ÷ 4 = 4,667,629.75
If the quotient is a whole number, then 4 and 4,667,629.75 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 | 18,670,519 | |
| -1 | 18,670,519 |
If you did it right, you will end up with this table:
| 1 | 7 | 29 | 49 | 203 | 343 | 1,421 | 1,877 | 9,947 | 13,139 | 54,433 | 91,973 | 381,031 | 643,811 | 2,667,217 | 18,670,519 |
| -1 | -7 | -29 | -49 | -203 | -343 | -1,421 | -1,877 | -9,947 | -13,139 | -54,433 | -91,973 | -381,031 | -643,811 | -2,667,217 | -18,670,519 |
Here are some more numbers to try:
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