A:
Positive:
1 x 160803855 x 321607717 x 94590537 x 43460585 x 189181185 x 86921629 x 255653145 x 5113
Negative:
-1 x -16080385-5 x -3216077-17 x -945905-37 x -434605-85 x -189181-185 x -86921-629 x -25565-3145 x -5113
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 16,080,385, 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 | 16,080,385 | |
| -1 | -16,080,385 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,080,385.
Example:
1 x 16,080,385 = 16,080,385
and
-1 x -16,080,385 = 16,080,385
Notice both answers equal 16,080,385
With that explanation out of the way, let's continue. Next, we take the number 16,080,385 and divide it by 2:
16,080,385 ÷ 2 = 8,040,192.5
If the quotient is a whole number, then 2 and 8,040,192.5 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 | 16,080,385 | |
| -1 | -16,080,385 |
Now, we try dividing 16,080,385 by 3:
16,080,385 ÷ 3 = 5,360,128.3333
If the quotient is a whole number, then 3 and 5,360,128.3333 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 | 16,080,385 | |
| -1 | -16,080,385 |
Let's try dividing by 4:
16,080,385 ÷ 4 = 4,020,096.25
If the quotient is a whole number, then 4 and 4,020,096.25 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 | 16,080,385 | |
| -1 | 16,080,385 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 37 | 85 | 185 | 629 | 3,145 | 5,113 | 25,565 | 86,921 | 189,181 | 434,605 | 945,905 | 3,216,077 | 16,080,385 |
| -1 | -5 | -17 | -37 | -85 | -185 | -629 | -3,145 | -5,113 | -25,565 | -86,921 | -189,181 | -434,605 | -945,905 | -3,216,077 | -16,080,385 |
Here are some more numbers to try:
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