A:
Positive:
1 x 25774217 x 36820311 x 23431117 x 15161377 x 33473119 x 21659121 x 21301179 x 14399187 x 13783847 x 30431253 x 20571309 x 1969
Negative:
-1 x -2577421-7 x -368203-11 x -234311-17 x -151613-77 x -33473-119 x -21659-121 x -21301-179 x -14399-187 x -13783-847 x -3043-1253 x -2057-1309 x -1969
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 2,577,421, 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 | 2,577,421 | |
| -1 | -2,577,421 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,577,421.
Example:
1 x 2,577,421 = 2,577,421
and
-1 x -2,577,421 = 2,577,421
Notice both answers equal 2,577,421
With that explanation out of the way, let's continue. Next, we take the number 2,577,421 and divide it by 2:
2,577,421 ÷ 2 = 1,288,710.5
If the quotient is a whole number, then 2 and 1,288,710.5 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 | 2,577,421 | |
| -1 | -2,577,421 |
Now, we try dividing 2,577,421 by 3:
2,577,421 ÷ 3 = 859,140.3333
If the quotient is a whole number, then 3 and 859,140.3333 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 | 2,577,421 | |
| -1 | -2,577,421 |
Let's try dividing by 4:
2,577,421 ÷ 4 = 644,355.25
If the quotient is a whole number, then 4 and 644,355.25 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 | 2,577,421 | |
| -1 | 2,577,421 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 77 | 119 | 121 | 179 | 187 | 847 | 1,253 | 1,309 | 1,969 | 2,057 | 3,043 | 13,783 | 14,399 | 21,301 | 21,659 | 33,473 | 151,613 | 234,311 | 368,203 | 2,577,421 |
| -1 | -7 | -11 | -17 | -77 | -119 | -121 | -179 | -187 | -847 | -1,253 | -1,309 | -1,969 | -2,057 | -3,043 | -13,783 | -14,399 | -21,301 | -21,659 | -33,473 | -151,613 | -234,311 | -368,203 | -2,577,421 |
Here are some more numbers to try:
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