A:
Positive:
1 x 307126455 x 614252919 x 161645595 x 323291151 x 203395755 x 406792141 x 143452869 x 10705
Negative:
-1 x -30712645-5 x -6142529-19 x -1616455-95 x -323291-151 x -203395-755 x -40679-2141 x -14345-2869 x -10705
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 30,712,645, 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 | 30,712,645 | |
| -1 | -30,712,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,712,645.
Example:
1 x 30,712,645 = 30,712,645
and
-1 x -30,712,645 = 30,712,645
Notice both answers equal 30,712,645
With that explanation out of the way, let's continue. Next, we take the number 30,712,645 and divide it by 2:
30,712,645 ÷ 2 = 15,356,322.5
If the quotient is a whole number, then 2 and 15,356,322.5 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 | 30,712,645 | |
| -1 | -30,712,645 |
Now, we try dividing 30,712,645 by 3:
30,712,645 ÷ 3 = 10,237,548.3333
If the quotient is a whole number, then 3 and 10,237,548.3333 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 | 30,712,645 | |
| -1 | -30,712,645 |
Let's try dividing by 4:
30,712,645 ÷ 4 = 7,678,161.25
If the quotient is a whole number, then 4 and 7,678,161.25 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 | 30,712,645 | |
| -1 | 30,712,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 151 | 755 | 2,141 | 2,869 | 10,705 | 14,345 | 40,679 | 203,395 | 323,291 | 1,616,455 | 6,142,529 | 30,712,645 |
| -1 | -5 | -19 | -95 | -151 | -755 | -2,141 | -2,869 | -10,705 | -14,345 | -40,679 | -203,395 | -323,291 | -1,616,455 | -6,142,529 | -30,712,645 |
Here are some more numbers to try:
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