A:
Positive:
1 x 2067726111 x 187975129 x 71300953 x 390137319 x 64819583 x 354671223 x 169071537 x 13453
Negative:
-1 x -20677261-11 x -1879751-29 x -713009-53 x -390137-319 x -64819-583 x -35467-1223 x -16907-1537 x -13453
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 20,677,261, 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 | 20,677,261 | |
| -1 | -20,677,261 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,677,261.
Example:
1 x 20,677,261 = 20,677,261
and
-1 x -20,677,261 = 20,677,261
Notice both answers equal 20,677,261
With that explanation out of the way, let's continue. Next, we take the number 20,677,261 and divide it by 2:
20,677,261 ÷ 2 = 10,338,630.5
If the quotient is a whole number, then 2 and 10,338,630.5 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 | 20,677,261 | |
| -1 | -20,677,261 |
Now, we try dividing 20,677,261 by 3:
20,677,261 ÷ 3 = 6,892,420.3333
If the quotient is a whole number, then 3 and 6,892,420.3333 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 | 20,677,261 | |
| -1 | -20,677,261 |
Let's try dividing by 4:
20,677,261 ÷ 4 = 5,169,315.25
If the quotient is a whole number, then 4 and 5,169,315.25 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 | 20,677,261 | |
| -1 | 20,677,261 |
If you did it right, you will end up with this table:
| 1 | 11 | 29 | 53 | 319 | 583 | 1,223 | 1,537 | 13,453 | 16,907 | 35,467 | 64,819 | 390,137 | 713,009 | 1,879,751 | 20,677,261 |
| -1 | -11 | -29 | -53 | -319 | -583 | -1,223 | -1,537 | -13,453 | -16,907 | -35,467 | -64,819 | -390,137 | -713,009 | -1,879,751 | -20,677,261 |
Here are some more numbers to try:
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