A:
Positive:
1 x 1535222155 x 307044437 x 2193174511 x 1395656535 x 438634955 x 279131377 x 1993795385 x 398759
Negative:
-1 x -153522215-5 x -30704443-7 x -21931745-11 x -13956565-35 x -4386349-55 x -2791313-77 x -1993795-385 x -398759
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 153,522,215, 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 | 153,522,215 | |
| -1 | -153,522,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 153,522,215.
Example:
1 x 153,522,215 = 153,522,215
and
-1 x -153,522,215 = 153,522,215
Notice both answers equal 153,522,215
With that explanation out of the way, let's continue. Next, we take the number 153,522,215 and divide it by 2:
153,522,215 ÷ 2 = 76,761,107.5
If the quotient is a whole number, then 2 and 76,761,107.5 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 | 153,522,215 | |
| -1 | -153,522,215 |
Now, we try dividing 153,522,215 by 3:
153,522,215 ÷ 3 = 51,174,071.6667
If the quotient is a whole number, then 3 and 51,174,071.6667 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 | 153,522,215 | |
| -1 | -153,522,215 |
Let's try dividing by 4:
153,522,215 ÷ 4 = 38,380,553.75
If the quotient is a whole number, then 4 and 38,380,553.75 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 | 153,522,215 | |
| -1 | 153,522,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 398,759 | 1,993,795 | 2,791,313 | 4,386,349 | 13,956,565 | 21,931,745 | 30,704,443 | 153,522,215 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -398,759 | -1,993,795 | -2,791,313 | -4,386,349 | -13,956,565 | -21,931,745 | -30,704,443 | -153,522,215 |
Here are some more numbers to try:
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