1 + 2 + 4 + 5 + 10 + 20 = 42
10 and -5 are factors of -20.
Factors for 20 are: 1, 2, 4, 5, 10, 20 Prime Factors: 2, 5 sum of prime factors = 2 + 5 = 7
Factors of 20 are 1, 2, 4, 5, 10 and 20. And their sum is 1 + 2 + 4 + 5 + 10 + 20 = 32.
2,4,8,10 and 16 are factors of 400.
8 and 12 are factors of 20, 8 + 12 = 20
10 and 4
20 and 30.
The two factors of 24 that give you a sum of 20 are 12 and 8.
10 and 2
It is: 3+17 = 20
1 + 2 + 4 = 7
The factors of 91 are: 1 7 13 91.The prime factors are: 7 x 13The sum of the prime factors = 7 + 13 = 20