A048050 - cp's OEIS frontend

A048050 Chowla's function: sum of divisors of n except for 1 and n.

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	6
9	3
10	7
11	0
12	15
13	0
14	9
15	8
16	14
17	0
18	20
19	0
20	21
21	10
22	13
23	0
24	35
25	5
26	15
27	12
28	27
29	0
30	41
31	0
32	30
33	14
34	19
35	12
36	54
37	0
38	21
39	16
40	49
41	0
42	53
43	0
44	39
45	32
46	25
47	0
48	75
49	7
50	42
51	20
52	45
53	0
54	65
55	16
56	63
57	22
58	31
59	0
60	107
61	0
62	33
63	40
64	62
65	18
66	77
67	0
68	57
69	26
70	73
71	0
72	122
73	0
74	39
75	48
76	63
77	18
78	89

[0, 0, 0, 2, 0, 5, 0, 6, 3, 7, 0, 15, 0, 9, 8, 14, 0, 20, 0, 21, 10, 13, 0, 35, 5, 15, 12, 27, 0, 41, 0, 30, 14, 19, 12, 54, 0, 21, 16, 49, 0, 53, 0, 39, 32, 25, 0, 75, 7, 42, 20, 45, 0, 65, 16, 63, 22, 31, 0, 107, 0, 33, 40, 62, 18, 77, 0, 57, 26, 73, 0, 122, 0, 39, 48, 63, 18, 89]

cp's OEIS Frontend

A048050 Chowla's function: sum of divisors of n except for 1 and n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	6
9	3
10	7
11	0
12	15
13	0
14	9
15	8
16	14
17	0
18	20
19	0
20	21
21	10
22	13
23	0
24	35
25	5
26	15
27	12
28	27
29	0
30	41
31	0
32	30
33	14
34	19
35	12
36	54
37	0
38	21
39	16
40	49
41	0
42	53
43	0
44	39
45	32
46	25
47	0
48	75
49	7
50	42
51	20
52	45
53	0
54	65
55	16
56	63
57	22
58	31
59	0
60	107
61	0
62	33
63	40
64	62
65	18
66	77
67	0
68	57
69	26
70	73
71	0
72	122
73	0
74	39
75	48
76	63
77	18
78	89

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	6
9	3
10	7
11	0
12	15
13	0
14	9
15	8
16	14
17	0
18	20
19	0
20	21
21	10
22	13
23	0
24	35
25	5
26	15
27	12
28	27
29	0
30	41
31	0
32	30
33	14
34	19
35	12
36	54
37	0
38	21
39	16
40	49
41	0
42	53
43	0
44	39
45	32
46	25
47	0
48	75
49	7
50	42
51	20
52	45
53	0
54	65
55	16
56	63
57	22
58	31
59	0
60	107
61	0
62	33
63	40
64	62
65	18
66	77
67	0
68	57
69	26
70	73
71	0
72	122
73	0
74	39
75	48
76	63
77	18
78	89

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	6
9	3
10	7
11	0
12	15
13	0
14	9
15	8
16	14
17	0
18	20
19	0
20	21
21	10
22	13
23	0
24	35
25	5
26	15
27	12
28	27
29	0
30	41
31	0
32	30
33	14
34	19
35	12
36	54
37	0
38	21
39	16
40	49
41	0
42	53
43	0
44	39
45	32
46	25
47	0
48	75
49	7
50	42
51	20
52	45
53	0
54	65
55	16
56	63
57	22
58	31
59	0
60	107
61	0
62	33
63	40
64	62
65	18
66	77
67	0
68	57
69	26
70	73
71	0
72	122
73	0
74	39
75	48
76	63
77	18
78	89