2 + 5 + 10 + 25 = 42
The sum of the positive factors of 504 is: 1,560
Prime numbers, like 29, don't have proper factors.
The common factors of 50 and 98 are: 1 and 2
The factors of 48 are: 1, 2, 3, 4, 6, 8, 12, 16, 24, and 48. Their sum is 124.
90 and 168
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.
53
53
154 is the sum of the proper factors of 256.
samllest factors of 250 are 50 and 5 and the sum of 50 and 5 is 50+5=55
64.
The proper factors of 50 are 2, 5, 10, and 25.
It is 496.496 = 24*31 so its proper factors are 2, 4, 8, 16, 31, 62, 124 and 248. Their sum is 495.
The proper factors of 50 are 2, 5, 10 and 25.
48
39 is a composite number whose proper factors add up to 16.
By some definitions prime numbers don't have proper factors. In other definitions, their only proper factor is 1. Either way, your answer is the next prime number after 50, which would be 53.