A:
Positive:
1 x 4206047455 x 8412094911 x 3823679531 x 1356789555 x 7647359155 x 2713579341 x 12334451705 x 246689
Negative:
-1 x -420604745-5 x -84120949-11 x -38236795-31 x -13567895-55 x -7647359-155 x -2713579-341 x -1233445-1705 x -246689
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 420,604,745, 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 | 420,604,745 | |
| -1 | -420,604,745 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 420,604,745.
Example:
1 x 420,604,745 = 420,604,745
and
-1 x -420,604,745 = 420,604,745
Notice both answers equal 420,604,745
With that explanation out of the way, let's continue. Next, we take the number 420,604,745 and divide it by 2:
420,604,745 ÷ 2 = 210,302,372.5
If the quotient is a whole number, then 2 and 210,302,372.5 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 | 420,604,745 | |
| -1 | -420,604,745 |
Now, we try dividing 420,604,745 by 3:
420,604,745 ÷ 3 = 140,201,581.6667
If the quotient is a whole number, then 3 and 140,201,581.6667 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 | 420,604,745 | |
| -1 | -420,604,745 |
Let's try dividing by 4:
420,604,745 ÷ 4 = 105,151,186.25
If the quotient is a whole number, then 4 and 105,151,186.25 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 | 420,604,745 | |
| -1 | 420,604,745 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 31 | 55 | 155 | 341 | 1,705 | 246,689 | 1,233,445 | 2,713,579 | 7,647,359 | 13,567,895 | 38,236,795 | 84,120,949 | 420,604,745 |
| -1 | -5 | -11 | -31 | -55 | -155 | -341 | -1,705 | -246,689 | -1,233,445 | -2,713,579 | -7,647,359 | -13,567,895 | -38,236,795 | -84,120,949 | -420,604,745 |
Here are some more numbers to try:
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