A:
Positive:
1 x 721626437 x 1030894929 x 248836743 x 167820149 x 1472707203 x 355481301 x 2397431181 x 611031247 x 578691421 x 507832107 x 342498267 x 8729
Negative:
-1 x -72162643-7 x -10308949-29 x -2488367-43 x -1678201-49 x -1472707-203 x -355481-301 x -239743-1181 x -61103-1247 x -57869-1421 x -50783-2107 x -34249-8267 x -8729
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 72,162,643, 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 | 72,162,643 | |
| -1 | -72,162,643 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,162,643.
Example:
1 x 72,162,643 = 72,162,643
and
-1 x -72,162,643 = 72,162,643
Notice both answers equal 72,162,643
With that explanation out of the way, let's continue. Next, we take the number 72,162,643 and divide it by 2:
72,162,643 ÷ 2 = 36,081,321.5
If the quotient is a whole number, then 2 and 36,081,321.5 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 | 72,162,643 | |
| -1 | -72,162,643 |
Now, we try dividing 72,162,643 by 3:
72,162,643 ÷ 3 = 24,054,214.3333
If the quotient is a whole number, then 3 and 24,054,214.3333 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 | 72,162,643 | |
| -1 | -72,162,643 |
Let's try dividing by 4:
72,162,643 ÷ 4 = 18,040,660.75
If the quotient is a whole number, then 4 and 18,040,660.75 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 | 72,162,643 | |
| -1 | 72,162,643 |
If you did it right, you will end up with this table:
| 1 | 7 | 29 | 43 | 49 | 203 | 301 | 1,181 | 1,247 | 1,421 | 2,107 | 8,267 | 8,729 | 34,249 | 50,783 | 57,869 | 61,103 | 239,743 | 355,481 | 1,472,707 | 1,678,201 | 2,488,367 | 10,308,949 | 72,162,643 |
| -1 | -7 | -29 | -43 | -49 | -203 | -301 | -1,181 | -1,247 | -1,421 | -2,107 | -8,267 | -8,729 | -34,249 | -50,783 | -57,869 | -61,103 | -239,743 | -355,481 | -1,472,707 | -1,678,201 | -2,488,367 | -10,308,949 | -72,162,643 |
Here are some more numbers to try:
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