A:
Positive:
1 x 321212155 x 64242437 x 458874535 x 91774943 x 74700549 x 655535215 x 149401245 x 131107301 x 1067151505 x 213432107 x 152453049 x 10535
Negative:
-1 x -32121215-5 x -6424243-7 x -4588745-35 x -917749-43 x -747005-49 x -655535-215 x -149401-245 x -131107-301 x -106715-1505 x -21343-2107 x -15245-3049 x -10535
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 32,121,215, 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 | 32,121,215 | |
| -1 | -32,121,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 32,121,215.
Example:
1 x 32,121,215 = 32,121,215
and
-1 x -32,121,215 = 32,121,215
Notice both answers equal 32,121,215
With that explanation out of the way, let's continue. Next, we take the number 32,121,215 and divide it by 2:
32,121,215 ÷ 2 = 16,060,607.5
If the quotient is a whole number, then 2 and 16,060,607.5 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 | 32,121,215 | |
| -1 | -32,121,215 |
Now, we try dividing 32,121,215 by 3:
32,121,215 ÷ 3 = 10,707,071.6667
If the quotient is a whole number, then 3 and 10,707,071.6667 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 | 32,121,215 | |
| -1 | -32,121,215 |
Let's try dividing by 4:
32,121,215 ÷ 4 = 8,030,303.75
If the quotient is a whole number, then 4 and 8,030,303.75 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 | 32,121,215 | |
| -1 | 32,121,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 43 | 49 | 215 | 245 | 301 | 1,505 | 2,107 | 3,049 | 10,535 | 15,245 | 21,343 | 106,715 | 131,107 | 149,401 | 655,535 | 747,005 | 917,749 | 4,588,745 | 6,424,243 | 32,121,215 |
| -1 | -5 | -7 | -35 | -43 | -49 | -215 | -245 | -301 | -1,505 | -2,107 | -3,049 | -10,535 | -15,245 | -21,343 | -106,715 | -131,107 | -149,401 | -655,535 | -747,005 | -917,749 | -4,588,745 | -6,424,243 | -32,121,215 |
Here are some more numbers to try:
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