A:
Positive:
1 x 1664373113 x 128028717 x 979043127 x 131053221 x 75311593 x 280671651 x 100812159 x 7709
Negative:
-1 x -16643731-13 x -1280287-17 x -979043-127 x -131053-221 x -75311-593 x -28067-1651 x -10081-2159 x -7709
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 16,643,731, 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 | 16,643,731 | |
| -1 | -16,643,731 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,643,731.
Example:
1 x 16,643,731 = 16,643,731
and
-1 x -16,643,731 = 16,643,731
Notice both answers equal 16,643,731
With that explanation out of the way, let's continue. Next, we take the number 16,643,731 and divide it by 2:
16,643,731 ÷ 2 = 8,321,865.5
If the quotient is a whole number, then 2 and 8,321,865.5 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 | 16,643,731 | |
| -1 | -16,643,731 |
Now, we try dividing 16,643,731 by 3:
16,643,731 ÷ 3 = 5,547,910.3333
If the quotient is a whole number, then 3 and 5,547,910.3333 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 | 16,643,731 | |
| -1 | -16,643,731 |
Let's try dividing by 4:
16,643,731 ÷ 4 = 4,160,932.75
If the quotient is a whole number, then 4 and 4,160,932.75 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 | 16,643,731 | |
| -1 | 16,643,731 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 127 | 221 | 593 | 1,651 | 2,159 | 7,709 | 10,081 | 28,067 | 75,311 | 131,053 | 979,043 | 1,280,287 | 16,643,731 |
| -1 | -13 | -17 | -127 | -221 | -593 | -1,651 | -2,159 | -7,709 | -10,081 | -28,067 | -75,311 | -131,053 | -979,043 | -1,280,287 | -16,643,731 |
Here are some more numbers to try:
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