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Square numbers have an odd number of factors. Other numbers have an even number of factors. The squares between 12 and 40 include 16, 25, and 36. If the number has only three factors, it must be the square of a Prime number, since two of the factors will be 1 and itself, so if there is only one more factor, this third number cannot have factors itself. This means the number must be 25, whose factors are 1, 5, and 25. Response: 24 has (at least) three factors - 1, 2, 3, 4, 6, 8, 12, and 24 .
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What number between 20 and 30 has two prime factors and 3 composite factors?
28
What is Composite number between 60 and 70 The number has prime factors that have a sum of 12?
66
What number between 1 and 20 has the most factors?
It's a tie between 12 and 18. Each of them has 6 factors. Factors of 12: 1, 2, 3, 4, 6, and 12. Factors of 18: 1, 2, 3, 6, 9, and 18.
What number between 1 and 100 has 12 factors?
60, 72, 84, 90 and 96
What number has the largest number of factors from 1-100?
The maximum number of different factors is 12 and there are 5 numbers in 1-100 which have 12 factors.
