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2: 1, 2 (3) deficient

3: 1, 3 (4) deficient

4: 1, 2, 4 (7) deficient

5: 1, 5 (6) deficient

6: 1, 2, 3, 6 (12) perfect

7: 1, 7 (8) deficient

8: 1, 2, 4, 8 (15) deficient

9: 1, 3, 9 (13) deficient

10: 1, 2, 5, 10 (18) deficient

11: 1, 11 (12) deficient

12: 1, 2, 3, 4, 6, 12 (28) abundant

13: 1, 13 (14) deficient

14: 1, 2, 7, 14 (24) deficient

15: 1, 3, 5, 15 (24) deficient

16: 1, 2, 4, 8, 16 (31) deficient

17: 1, 17 (18) deficient

18: 1, 2, 3, 6, 9, 18 (39) abundant

19: 1, 19 (20) deficient

20: 1, 2, 4, 5, 10, 20 (42) abundant

21: 1, 3, 7, 21 (32) deficient

22: 1, 2, 11, 22 (26) deficient

23: 1, 23 (24) deficient

24: 1, 2, 3, 4, 6, 8, 12, 24 (60) abundant

25: 1, 5, 25 (31) deficient

26: 1, 2, 13, 26 (42) deficient

27: 1, 3, 9, 27 (40) deficient

28: 1, 2, 4, 7, 14, 28 (56) perfect

29: 1, 29 (30) deficient

30: 1, 2, 3, 5, 6, 10, 15, 30 (72) abundant

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Q: What are the factors sum of the numbers 2-30 and classify each as perfect abundant or deficient?

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There are more deficient numbers.

No. All prime numbers are deficient.

Abundant, deficient and perfect numbers are determined by the sum of the proper divisors (or factors) of a number, which excludes the number itself. The factors of 76 are : 1,2,4,19,38,76 . . . after excluding the number itself the sum of the proper divisors is :- 1+2+4+19+38= 64 Deficient numbers occur when the sum of the proper divisors is less than the number itself. As 64 is less that 76 then it is deficient.

All prime numbers are going to be deficient, because remember that a prime number's only factors are one and itself. To find if its deficient or abundant, you'd add up all of its factors, excluding itself. If its only other factor beside itself is one, that's obviously less than the number, and therefore it will be deficient.

The answer will depend on where "there" is.

No, all prime numbers are deficient.

no, 945 is the first abundant odd number though

A perfect number is one with factors (apart from itself) that sum to give the original number. An abundant number is one where this sum is greater than the original number. A deficient number is one where the sum is less than the original number. The factors of 75 are 1, 3, 5, 15 and 25. The sum of these numbers is 49. Thus 75 is a deficient number.

All odd numbers with one or two distinct prime factors are deficient. Since 3 and 7 are factors of 63, it must be deficient.

Add together all the factors of a number, apart from itself. If the answer is less than the number, then it is deficient. If the answer is equal to the number, then it is perfect. If the answer is greater than the number, then it is abundant. The factors of 8 are 1, 2 and 4. 1+2+4 = 7 so 8 is deficient. The factors of 6 are 1, 2 and 3. 1+2+3 = 6 so 6 is perfect. The factors of 12 are 1, 2, 3, 4 and 6. 1+2+3+4+6 = 16 so 12 is abundant.

it depends on witch 2 numbers you want to add together

A perfect square.

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