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.
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.
64.
39
30
36 The factors of 36 are : 36,18,12,9,6,4,3,2 and 1.
It is 30.
There is no such number. For if you considered 49.99 to be such a number, then 49.995 is a greater number and it is less than 50. And then 49.9955 is even greater and still less than 50. This process can go on without end.
I think it's 51.