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Prime squares: 4, 9, 25, 49

4, 9, 25 and 49

Q: What number less than 50 that have 3 factors?

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39

30

No. The Maximum Factor for any number that is less than itself can be only 50% of its value.

The only integer with both those as multiples is 1.The only integer with both those as multiples is 1.The only integer with both those as multiples is 1.The only integer with both those as multiples is 1.

It is 496.496 = 24*31 so its proper factors are 2, 4, 8, 16, 31, 62, 124 and 248. Their sum is 495.

Related questions

48 has 10 factors, the most factors of any number under 50.

48

42

1 has one factor.

The numbers for which the sum of its proper factors is 1 less than the number is the powers of 2; less than 50 these are: 2, 4, 8, 16 & 32.

30, 40, 42

64.

39

36 The factors of 36 are : 36,18,12,9,6,4,3,2 and 1.

It is 30.

30

I think it's 51.