A:
Positive:
1 x 3015577731 x 97276737 x 81502161 x 494357431 x 699671147 x 262911891 x 159472257 x 13361
Negative:
-1 x -30155777-31 x -972767-37 x -815021-61 x -494357-431 x -69967-1147 x -26291-1891 x -15947-2257 x -13361
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 30,155,777, 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 | 30,155,777 | |
| -1 | -30,155,777 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,155,777.
Example:
1 x 30,155,777 = 30,155,777
and
-1 x -30,155,777 = 30,155,777
Notice both answers equal 30,155,777
With that explanation out of the way, let's continue. Next, we take the number 30,155,777 and divide it by 2:
30,155,777 ÷ 2 = 15,077,888.5
If the quotient is a whole number, then 2 and 15,077,888.5 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 | 30,155,777 | |
| -1 | -30,155,777 |
Now, we try dividing 30,155,777 by 3:
30,155,777 ÷ 3 = 10,051,925.6667
If the quotient is a whole number, then 3 and 10,051,925.6667 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 | 30,155,777 | |
| -1 | -30,155,777 |
Let's try dividing by 4:
30,155,777 ÷ 4 = 7,538,944.25
If the quotient is a whole number, then 4 and 7,538,944.25 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 | 30,155,777 | |
| -1 | 30,155,777 |
If you did it right, you will end up with this table:
| 1 | 31 | 37 | 61 | 431 | 1,147 | 1,891 | 2,257 | 13,361 | 15,947 | 26,291 | 69,967 | 494,357 | 815,021 | 972,767 | 30,155,777 |
| -1 | -31 | -37 | -61 | -431 | -1,147 | -1,891 | -2,257 | -13,361 | -15,947 | -26,291 | -69,967 | -494,357 | -815,021 | -972,767 | -30,155,777 |
Here are some more numbers to try:
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