A:
Positive:
1 x 164066155 x 328132317 x 96509585 x 193019251 x 65365769 x 213351255 x 130733845 x 4267
Negative:
-1 x -16406615-5 x -3281323-17 x -965095-85 x -193019-251 x -65365-769 x -21335-1255 x -13073-3845 x -4267
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 16,406,615, 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 | 16,406,615 | |
| -1 | -16,406,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,406,615.
Example:
1 x 16,406,615 = 16,406,615
and
-1 x -16,406,615 = 16,406,615
Notice both answers equal 16,406,615
With that explanation out of the way, let's continue. Next, we take the number 16,406,615 and divide it by 2:
16,406,615 ÷ 2 = 8,203,307.5
If the quotient is a whole number, then 2 and 8,203,307.5 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 | 16,406,615 | |
| -1 | -16,406,615 |
Now, we try dividing 16,406,615 by 3:
16,406,615 ÷ 3 = 5,468,871.6667
If the quotient is a whole number, then 3 and 5,468,871.6667 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 | 16,406,615 | |
| -1 | -16,406,615 |
Let's try dividing by 4:
16,406,615 ÷ 4 = 4,101,653.75
If the quotient is a whole number, then 4 and 4,101,653.75 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 | 16,406,615 | |
| -1 | 16,406,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 251 | 769 | 1,255 | 3,845 | 4,267 | 13,073 | 21,335 | 65,365 | 193,019 | 965,095 | 3,281,323 | 16,406,615 |
| -1 | -5 | -17 | -85 | -251 | -769 | -1,255 | -3,845 | -4,267 | -13,073 | -21,335 | -65,365 | -193,019 | -965,095 | -3,281,323 | -16,406,615 |
Here are some more numbers to try:
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