A:
Positive:
1 x 421000155 x 842000331 x 135806547 x 895745155 x 271613235 x 1791491457 x 288955779 x 7285
Negative:
-1 x -42100015-5 x -8420003-31 x -1358065-47 x -895745-155 x -271613-235 x -179149-1457 x -28895-5779 x -7285
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 42,100,015, 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 | 42,100,015 | |
| -1 | -42,100,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 42,100,015.
Example:
1 x 42,100,015 = 42,100,015
and
-1 x -42,100,015 = 42,100,015
Notice both answers equal 42,100,015
With that explanation out of the way, let's continue. Next, we take the number 42,100,015 and divide it by 2:
42,100,015 ÷ 2 = 21,050,007.5
If the quotient is a whole number, then 2 and 21,050,007.5 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 | 42,100,015 | |
| -1 | -42,100,015 |
Now, we try dividing 42,100,015 by 3:
42,100,015 ÷ 3 = 14,033,338.3333
If the quotient is a whole number, then 3 and 14,033,338.3333 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 | 42,100,015 | |
| -1 | -42,100,015 |
Let's try dividing by 4:
42,100,015 ÷ 4 = 10,525,003.75
If the quotient is a whole number, then 4 and 10,525,003.75 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 | 42,100,015 | |
| -1 | 42,100,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 47 | 155 | 235 | 1,457 | 5,779 | 7,285 | 28,895 | 179,149 | 271,613 | 895,745 | 1,358,065 | 8,420,003 | 42,100,015 |
| -1 | -5 | -31 | -47 | -155 | -235 | -1,457 | -5,779 | -7,285 | -28,895 | -179,149 | -271,613 | -895,745 | -1,358,065 | -8,420,003 | -42,100,015 |
Here are some more numbers to try:
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