A:
Positive:
1 x 4024204037 x 5748862911 x 3658367371 x 566789377 x 5226239497 x 809699781 x 5152635467 x 73609
Negative:
-1 x -402420403-7 x -57488629-11 x -36583673-71 x -5667893-77 x -5226239-497 x -809699-781 x -515263-5467 x -73609
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 402,420,403, 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 | 402,420,403 | |
| -1 | -402,420,403 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 402,420,403.
Example:
1 x 402,420,403 = 402,420,403
and
-1 x -402,420,403 = 402,420,403
Notice both answers equal 402,420,403
With that explanation out of the way, let's continue. Next, we take the number 402,420,403 and divide it by 2:
402,420,403 ÷ 2 = 201,210,201.5
If the quotient is a whole number, then 2 and 201,210,201.5 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 | 402,420,403 | |
| -1 | -402,420,403 |
Now, we try dividing 402,420,403 by 3:
402,420,403 ÷ 3 = 134,140,134.3333
If the quotient is a whole number, then 3 and 134,140,134.3333 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 | 402,420,403 | |
| -1 | -402,420,403 |
Let's try dividing by 4:
402,420,403 ÷ 4 = 100,605,100.75
If the quotient is a whole number, then 4 and 100,605,100.75 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 | 402,420,403 | |
| -1 | 402,420,403 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 71 | 77 | 497 | 781 | 5,467 | 73,609 | 515,263 | 809,699 | 5,226,239 | 5,667,893 | 36,583,673 | 57,488,629 | 402,420,403 |
| -1 | -7 | -11 | -71 | -77 | -497 | -781 | -5,467 | -73,609 | -515,263 | -809,699 | -5,226,239 | -5,667,893 | -36,583,673 | -57,488,629 | -402,420,403 |
Here are some more numbers to try:
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