A:
Positive:
1 x 6641046237 x 9487208913 x 5108497191 x 7297853137 x 4847479959 x 6924971781 x 37288312467 x 53269
Negative:
-1 x -664104623-7 x -94872089-13 x -51084971-91 x -7297853-137 x -4847479-959 x -692497-1781 x -372883-12467 x -53269
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 664,104,623, 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 | 664,104,623 | |
| -1 | -664,104,623 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 664,104,623.
Example:
1 x 664,104,623 = 664,104,623
and
-1 x -664,104,623 = 664,104,623
Notice both answers equal 664,104,623
With that explanation out of the way, let's continue. Next, we take the number 664,104,623 and divide it by 2:
664,104,623 ÷ 2 = 332,052,311.5
If the quotient is a whole number, then 2 and 332,052,311.5 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 | 664,104,623 | |
| -1 | -664,104,623 |
Now, we try dividing 664,104,623 by 3:
664,104,623 ÷ 3 = 221,368,207.6667
If the quotient is a whole number, then 3 and 221,368,207.6667 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 | 664,104,623 | |
| -1 | -664,104,623 |
Let's try dividing by 4:
664,104,623 ÷ 4 = 166,026,155.75
If the quotient is a whole number, then 4 and 166,026,155.75 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 | 664,104,623 | |
| -1 | 664,104,623 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 137 | 959 | 1,781 | 12,467 | 53,269 | 372,883 | 692,497 | 4,847,479 | 7,297,853 | 51,084,971 | 94,872,089 | 664,104,623 |
| -1 | -7 | -13 | -91 | -137 | -959 | -1,781 | -12,467 | -53,269 | -372,883 | -692,497 | -4,847,479 | -7,297,853 | -51,084,971 | -94,872,089 | -664,104,623 |
Here are some more numbers to try:
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