A:
Positive:
1 x 720316037 x 1029022919 x 3791137133 x 541591379 x 1900571429 x 504072653 x 271517201 x 10003
Negative:
-1 x -72031603-7 x -10290229-19 x -3791137-133 x -541591-379 x -190057-1429 x -50407-2653 x -27151-7201 x -10003
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 72,031,603, 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 | 72,031,603 | |
| -1 | -72,031,603 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,031,603.
Example:
1 x 72,031,603 = 72,031,603
and
-1 x -72,031,603 = 72,031,603
Notice both answers equal 72,031,603
With that explanation out of the way, let's continue. Next, we take the number 72,031,603 and divide it by 2:
72,031,603 ÷ 2 = 36,015,801.5
If the quotient is a whole number, then 2 and 36,015,801.5 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 | 72,031,603 | |
| -1 | -72,031,603 |
Now, we try dividing 72,031,603 by 3:
72,031,603 ÷ 3 = 24,010,534.3333
If the quotient is a whole number, then 3 and 24,010,534.3333 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 | 72,031,603 | |
| -1 | -72,031,603 |
Let's try dividing by 4:
72,031,603 ÷ 4 = 18,007,900.75
If the quotient is a whole number, then 4 and 18,007,900.75 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 | 72,031,603 | |
| -1 | 72,031,603 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 133 | 379 | 1,429 | 2,653 | 7,201 | 10,003 | 27,151 | 50,407 | 190,057 | 541,591 | 3,791,137 | 10,290,229 | 72,031,603 |
| -1 | -7 | -19 | -133 | -379 | -1,429 | -2,653 | -7,201 | -10,003 | -27,151 | -50,407 | -190,057 | -541,591 | -3,791,137 | -10,290,229 | -72,031,603 |
Here are some more numbers to try:
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