A:
Positive:
1 x 162059155 x 324118311 x 147326523 x 70460555 x 294653115 x 140921253 x 64055529 x 30635557 x 290951265 x 128112645 x 61272785 x 5819
Negative:
-1 x -16205915-5 x -3241183-11 x -1473265-23 x -704605-55 x -294653-115 x -140921-253 x -64055-529 x -30635-557 x -29095-1265 x -12811-2645 x -6127-2785 x -5819
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 16,205,915, 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 | 16,205,915 | |
| -1 | -16,205,915 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,205,915.
Example:
1 x 16,205,915 = 16,205,915
and
-1 x -16,205,915 = 16,205,915
Notice both answers equal 16,205,915
With that explanation out of the way, let's continue. Next, we take the number 16,205,915 and divide it by 2:
16,205,915 ÷ 2 = 8,102,957.5
If the quotient is a whole number, then 2 and 8,102,957.5 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 | 16,205,915 | |
| -1 | -16,205,915 |
Now, we try dividing 16,205,915 by 3:
16,205,915 ÷ 3 = 5,401,971.6667
If the quotient is a whole number, then 3 and 5,401,971.6667 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 | 16,205,915 | |
| -1 | -16,205,915 |
Let's try dividing by 4:
16,205,915 ÷ 4 = 4,051,478.75
If the quotient is a whole number, then 4 and 4,051,478.75 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 | 16,205,915 | |
| -1 | 16,205,915 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 23 | 55 | 115 | 253 | 529 | 557 | 1,265 | 2,645 | 2,785 | 5,819 | 6,127 | 12,811 | 29,095 | 30,635 | 64,055 | 140,921 | 294,653 | 704,605 | 1,473,265 | 3,241,183 | 16,205,915 |
| -1 | -5 | -11 | -23 | -55 | -115 | -253 | -529 | -557 | -1,265 | -2,645 | -2,785 | -5,819 | -6,127 | -12,811 | -29,095 | -30,635 | -64,055 | -140,921 | -294,653 | -704,605 | -1,473,265 | -3,241,183 | -16,205,915 |
Here are some more numbers to try:
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