A:
Positive:
1 x 21881755 x 43763511 x 19892525 x 8752755 x 3978573 x 29975109 x 20075275 x 7957365 x 5995545 x 4015803 x 27251199 x 1825
Negative:
-1 x -2188175-5 x -437635-11 x -198925-25 x -87527-55 x -39785-73 x -29975-109 x -20075-275 x -7957-365 x -5995-545 x -4015-803 x -2725-1199 x -1825
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 2,188,175, 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 | 2,188,175 | |
| -1 | -2,188,175 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,188,175.
Example:
1 x 2,188,175 = 2,188,175
and
-1 x -2,188,175 = 2,188,175
Notice both answers equal 2,188,175
With that explanation out of the way, let's continue. Next, we take the number 2,188,175 and divide it by 2:
2,188,175 ÷ 2 = 1,094,087.5
If the quotient is a whole number, then 2 and 1,094,087.5 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 | 2,188,175 | |
| -1 | -2,188,175 |
Now, we try dividing 2,188,175 by 3:
2,188,175 ÷ 3 = 729,391.6667
If the quotient is a whole number, then 3 and 729,391.6667 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 | 2,188,175 | |
| -1 | -2,188,175 |
Let's try dividing by 4:
2,188,175 ÷ 4 = 547,043.75
If the quotient is a whole number, then 4 and 547,043.75 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 | 2,188,175 | |
| -1 | 2,188,175 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 25 | 55 | 73 | 109 | 275 | 365 | 545 | 803 | 1,199 | 1,825 | 2,725 | 4,015 | 5,995 | 7,957 | 20,075 | 29,975 | 39,785 | 87,527 | 198,925 | 437,635 | 2,188,175 |
| -1 | -5 | -11 | -25 | -55 | -73 | -109 | -275 | -365 | -545 | -803 | -1,199 | -1,825 | -2,725 | -4,015 | -5,995 | -7,957 | -20,075 | -29,975 | -39,785 | -87,527 | -198,925 | -437,635 | -2,188,175 |
Here are some more numbers to try:
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