A:
Positive:
1 x 42002155 x 84004329 x 14483583 x 50605145 x 28967349 x 12035415 x 101211745 x 2407
Negative:
-1 x -4200215-5 x -840043-29 x -144835-83 x -50605-145 x -28967-349 x -12035-415 x -10121-1745 x -2407
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 4,200,215, 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 | 4,200,215 | |
| -1 | -4,200,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 4,200,215.
Example:
1 x 4,200,215 = 4,200,215
and
-1 x -4,200,215 = 4,200,215
Notice both answers equal 4,200,215
With that explanation out of the way, let's continue. Next, we take the number 4,200,215 and divide it by 2:
4,200,215 ÷ 2 = 2,100,107.5
If the quotient is a whole number, then 2 and 2,100,107.5 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 | 4,200,215 | |
| -1 | -4,200,215 |
Now, we try dividing 4,200,215 by 3:
4,200,215 ÷ 3 = 1,400,071.6667
If the quotient is a whole number, then 3 and 1,400,071.6667 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 | 4,200,215 | |
| -1 | -4,200,215 |
Let's try dividing by 4:
4,200,215 ÷ 4 = 1,050,053.75
If the quotient is a whole number, then 4 and 1,050,053.75 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 | 4,200,215 | |
| -1 | 4,200,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 83 | 145 | 349 | 415 | 1,745 | 2,407 | 10,121 | 12,035 | 28,967 | 50,605 | 144,835 | 840,043 | 4,200,215 |
| -1 | -5 | -29 | -83 | -145 | -349 | -415 | -1,745 | -2,407 | -10,121 | -12,035 | -28,967 | -50,605 | -144,835 | -840,043 | -4,200,215 |
Here are some more numbers to try:
Try the factor calculator