A:
Positive:
1 x 66386455 x 132772913 x 51066565 x 102133109 x 60905545 x 12181937 x 70851417 x 4685
Negative:
-1 x -6638645-5 x -1327729-13 x -510665-65 x -102133-109 x -60905-545 x -12181-937 x -7085-1417 x -4685
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 6,638,645, 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 | 6,638,645 | |
| -1 | -6,638,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 6,638,645.
Example:
1 x 6,638,645 = 6,638,645
and
-1 x -6,638,645 = 6,638,645
Notice both answers equal 6,638,645
With that explanation out of the way, let's continue. Next, we take the number 6,638,645 and divide it by 2:
6,638,645 ÷ 2 = 3,319,322.5
If the quotient is a whole number, then 2 and 3,319,322.5 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 | 6,638,645 | |
| -1 | -6,638,645 |
Now, we try dividing 6,638,645 by 3:
6,638,645 ÷ 3 = 2,212,881.6667
If the quotient is a whole number, then 3 and 2,212,881.6667 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 | 6,638,645 | |
| -1 | -6,638,645 |
Let's try dividing by 4:
6,638,645 ÷ 4 = 1,659,661.25
If the quotient is a whole number, then 4 and 1,659,661.25 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 | 6,638,645 | |
| -1 | 6,638,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 109 | 545 | 937 | 1,417 | 4,685 | 7,085 | 12,181 | 60,905 | 102,133 | 510,665 | 1,327,729 | 6,638,645 |
| -1 | -5 | -13 | -65 | -109 | -545 | -937 | -1,417 | -4,685 | -7,085 | -12,181 | -60,905 | -102,133 | -510,665 | -1,327,729 | -6,638,645 |
Here are some more numbers to try:
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