Sum of divisors = 91.
Sum of divisors: 1,392.
Sum of divisors: 1728.
Sum of divisors of 130 = 252.
Sum of 24's divisors: 60.
Sum of 150's divisors = 372.
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)
1 + 2 + 4 + 139 + 278 + 556 = 980
its 217
60