Sum of divisors = 91.
Sum of divisors: 1,392.
Sum of divisors: 980.
Sum of divisors of 130 = 252.
Sum of 24's divisors: 60.
Sum of 150's divisors = 372.
1 + 2 + 11 + 22 + 47 + 94 + 517 + 1034 = 1,728
A perfect number equals the sum of its proper divisors. A deficient number is greater than the sum of its proper divisors. An abundant number is less than the sum of its proper divisors. Proper divisors of a number do not include the number itself.
The sum is 195.
1, 2, 3, 4, 6, 8, 12, 24 (sum = 60)
its 217
60