A:
Positive:
1 x 302077155 x 604154343 x 702505109 x 277135215 x 140501545 x 554271289 x 234354687 x 6445
Negative:
-1 x -30207715-5 x -6041543-43 x -702505-109 x -277135-215 x -140501-545 x -55427-1289 x -23435-4687 x -6445
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 30,207,715, 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 | 30,207,715 | |
| -1 | -30,207,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,207,715.
Example:
1 x 30,207,715 = 30,207,715
and
-1 x -30,207,715 = 30,207,715
Notice both answers equal 30,207,715
With that explanation out of the way, let's continue. Next, we take the number 30,207,715 and divide it by 2:
30,207,715 ÷ 2 = 15,103,857.5
If the quotient is a whole number, then 2 and 15,103,857.5 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 | 30,207,715 | |
| -1 | -30,207,715 |
Now, we try dividing 30,207,715 by 3:
30,207,715 ÷ 3 = 10,069,238.3333
If the quotient is a whole number, then 3 and 10,069,238.3333 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 | 30,207,715 | |
| -1 | -30,207,715 |
Let's try dividing by 4:
30,207,715 ÷ 4 = 7,551,928.75
If the quotient is a whole number, then 4 and 7,551,928.75 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 | 30,207,715 | |
| -1 | 30,207,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 109 | 215 | 545 | 1,289 | 4,687 | 6,445 | 23,435 | 55,427 | 140,501 | 277,135 | 702,505 | 6,041,543 | 30,207,715 |
| -1 | -5 | -43 | -109 | -215 | -545 | -1,289 | -4,687 | -6,445 | -23,435 | -55,427 | -140,501 | -277,135 | -702,505 | -6,041,543 | -30,207,715 |
Here are some more numbers to try:
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