Zero. 5 is a prime so its only factors are 1 and 5. It, therefore, has no proper factors.
2 + 5 + 10 + 25 = 42
5 is a prime number so it doesn't have proper factors
1, 5, 7, and 35 are the factors of 35. The proper factors are 5 and 7.
The odd factors of 70 are: 1, 5, 7, and 35. The sum of these factors is 48.
The odd positive integer factors of 70 are: 1 5 7 35 The sum of these factors is 1 + 5 + 7 + 35 = 48
The sum is 1 plus 5 = 6
1, 3, 5, 9, 15, 45 (sum = 78).
Factors of 20 are 1, 2, 4, 5, 10 and 20. And their sum is 1 + 2 + 4 + 5 + 10 + 20 = 32.
1 + 15 + 3 + 5 = 24
1 + 5 + 13 + 65 = 84
Prime numbers, like 5, have no proper factors.
samllest factors of 250 are 50 and 5 and the sum of 50 and 5 is 50+5=55