A:
Positive:
1 x 161162155 x 322324323 x 700705115 x 140141353 x 45655397 x 405951765 x 91311985 x 8119
Negative:
-1 x -16116215-5 x -3223243-23 x -700705-115 x -140141-353 x -45655-397 x -40595-1765 x -9131-1985 x -8119
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 16,116,215, 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 | 16,116,215 | |
| -1 | -16,116,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,116,215.
Example:
1 x 16,116,215 = 16,116,215
and
-1 x -16,116,215 = 16,116,215
Notice both answers equal 16,116,215
With that explanation out of the way, let's continue. Next, we take the number 16,116,215 and divide it by 2:
16,116,215 ÷ 2 = 8,058,107.5
If the quotient is a whole number, then 2 and 8,058,107.5 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 | 16,116,215 | |
| -1 | -16,116,215 |
Now, we try dividing 16,116,215 by 3:
16,116,215 ÷ 3 = 5,372,071.6667
If the quotient is a whole number, then 3 and 5,372,071.6667 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 | 16,116,215 | |
| -1 | -16,116,215 |
Let's try dividing by 4:
16,116,215 ÷ 4 = 4,029,053.75
If the quotient is a whole number, then 4 and 4,029,053.75 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 | 16,116,215 | |
| -1 | 16,116,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 353 | 397 | 1,765 | 1,985 | 8,119 | 9,131 | 40,595 | 45,655 | 140,141 | 700,705 | 3,223,243 | 16,116,215 |
| -1 | -5 | -23 | -115 | -353 | -397 | -1,765 | -1,985 | -8,119 | -9,131 | -40,595 | -45,655 | -140,141 | -700,705 | -3,223,243 | -16,116,215 |
Here are some more numbers to try:
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