A:
Positive:
1 x 204791517 x 292559311 x 186174177 x 265963317 x 64603839 x 244092219 x 92293487 x 5873
Negative:
-1 x -20479151-7 x -2925593-11 x -1861741-77 x -265963-317 x -64603-839 x -24409-2219 x -9229-3487 x -5873
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 20,479,151, 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 | 20,479,151 | |
| -1 | -20,479,151 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,479,151.
Example:
1 x 20,479,151 = 20,479,151
and
-1 x -20,479,151 = 20,479,151
Notice both answers equal 20,479,151
With that explanation out of the way, let's continue. Next, we take the number 20,479,151 and divide it by 2:
20,479,151 ÷ 2 = 10,239,575.5
If the quotient is a whole number, then 2 and 10,239,575.5 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 | 20,479,151 | |
| -1 | -20,479,151 |
Now, we try dividing 20,479,151 by 3:
20,479,151 ÷ 3 = 6,826,383.6667
If the quotient is a whole number, then 3 and 6,826,383.6667 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 | 20,479,151 | |
| -1 | -20,479,151 |
Let's try dividing by 4:
20,479,151 ÷ 4 = 5,119,787.75
If the quotient is a whole number, then 4 and 5,119,787.75 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 | 20,479,151 | |
| -1 | 20,479,151 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 317 | 839 | 2,219 | 3,487 | 5,873 | 9,229 | 24,409 | 64,603 | 265,963 | 1,861,741 | 2,925,593 | 20,479,151 |
| -1 | -7 | -11 | -77 | -317 | -839 | -2,219 | -3,487 | -5,873 | -9,229 | -24,409 | -64,603 | -265,963 | -1,861,741 | -2,925,593 | -20,479,151 |
Here are some more numbers to try:
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