A:
Positive:
1 x 3573367217 x 5104810331 x 11526991217 x 1646713683 x 5231872411 x 1482114781 x 7474116877 x 21173
Negative:
-1 x -357336721-7 x -51048103-31 x -11526991-217 x -1646713-683 x -523187-2411 x -148211-4781 x -74741-16877 x -21173
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 357,336,721, 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 | 357,336,721 | |
| -1 | -357,336,721 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 357,336,721.
Example:
1 x 357,336,721 = 357,336,721
and
-1 x -357,336,721 = 357,336,721
Notice both answers equal 357,336,721
With that explanation out of the way, let's continue. Next, we take the number 357,336,721 and divide it by 2:
357,336,721 ÷ 2 = 178,668,360.5
If the quotient is a whole number, then 2 and 178,668,360.5 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 | 357,336,721 | |
| -1 | -357,336,721 |
Now, we try dividing 357,336,721 by 3:
357,336,721 ÷ 3 = 119,112,240.3333
If the quotient is a whole number, then 3 and 119,112,240.3333 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 | 357,336,721 | |
| -1 | -357,336,721 |
Let's try dividing by 4:
357,336,721 ÷ 4 = 89,334,180.25
If the quotient is a whole number, then 4 and 89,334,180.25 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 | 357,336,721 | |
| -1 | 357,336,721 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 217 | 683 | 2,411 | 4,781 | 16,877 | 21,173 | 74,741 | 148,211 | 523,187 | 1,646,713 | 11,526,991 | 51,048,103 | 357,336,721 |
| -1 | -7 | -31 | -217 | -683 | -2,411 | -4,781 | -16,877 | -21,173 | -74,741 | -148,211 | -523,187 | -1,646,713 | -11,526,991 | -51,048,103 | -357,336,721 |
Here are some more numbers to try:
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