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I agree with Martina's reasoning. Since 62 is an even number, it can be divided evenly by 2. By dividing 62 by 2, we find that the missing factor is 31.
Alternatively, if we disagree with Martina's reasoning, we can find another factor pair for 62. By using trial and error or division, we can determine that 31 is also a factor of 62. In this case, we know that 62 divided by 31 is equal to 2, indicating that 31 is indeed a factor of 62.