A:
Positive:
1 x 40251550131 x 12984371157 x 2563793191 x 2107411433 x 9295974867 x 827035921 x 6798113423 x 29987
Negative:
-1 x -402515501-31 x -12984371-157 x -2563793-191 x -2107411-433 x -929597-4867 x -82703-5921 x -67981-13423 x -29987
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 402,515,501, 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 | 402,515,501 | |
| -1 | -402,515,501 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 402,515,501.
Example:
1 x 402,515,501 = 402,515,501
and
-1 x -402,515,501 = 402,515,501
Notice both answers equal 402,515,501
With that explanation out of the way, let's continue. Next, we take the number 402,515,501 and divide it by 2:
402,515,501 ÷ 2 = 201,257,750.5
If the quotient is a whole number, then 2 and 201,257,750.5 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 | 402,515,501 | |
| -1 | -402,515,501 |
Now, we try dividing 402,515,501 by 3:
402,515,501 ÷ 3 = 134,171,833.6667
If the quotient is a whole number, then 3 and 134,171,833.6667 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 | 402,515,501 | |
| -1 | -402,515,501 |
Let's try dividing by 4:
402,515,501 ÷ 4 = 100,628,875.25
If the quotient is a whole number, then 4 and 100,628,875.25 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 | 402,515,501 | |
| -1 | 402,515,501 |
If you did it right, you will end up with this table:
| 1 | 31 | 157 | 191 | 433 | 4,867 | 5,921 | 13,423 | 29,987 | 67,981 | 82,703 | 929,597 | 2,107,411 | 2,563,793 | 12,984,371 | 402,515,501 |
| -1 | -31 | -157 | -191 | -433 | -4,867 | -5,921 | -13,423 | -29,987 | -67,981 | -82,703 | -929,597 | -2,107,411 | -2,563,793 | -12,984,371 | -402,515,501 |
Here are some more numbers to try:
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