A293228 - cp's OEIS frontend

A293228 a(n) is the sum of proper divisors of n that are squarefree.

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	6
7	1
8	3
9	4
10	8
11	1
12	12
13	1
14	10
15	9
16	3
17	1
18	12
19	1
20	18
21	11
22	14
23	1
24	12
25	6
26	16
27	4
28	24
29	1
30	42
31	1
32	3
33	15
34	20
35	13
36	12
37	1
38	22
39	17
40	18
41	1
42	54
43	1
44	36
45	24
46	26
47	1
48	12
49	8
50	18
51	21
52	42
53	1
54	12
55	17
56	24
57	23
58	32
59	1
60	72
61	1
62	34
63	32
64	3
65	19
66	78
67	1
68	54
69	27
70	74
71	1
72	12
73	1
74	40
75	24
76	60
77	19
78	90
79	1
80	18
81	4
82	44
83	1
84	96
85	23
86	46
87	33
88	36
89	1
90	72
91	21
92	72
93	35
94	50
95	25
96	12
97	1
98	24

[0, 1, 1, 3, 1, 6, 1, 3, 4, 8, 1, 12, 1, 10, 9, 3, 1, 12, 1, 18, 11, 14, 1, 12, 6, 16, 4, 24, 1, 42, 1, 3, 15, 20, 13, 12, 1, 22, 17, 18, 1, 54, 1, 36, 24, 26, 1, 12, 8, 18, 21, 42, 1, 12, 17, 24, 23, 32, 1, 72, 1, 34, 32, 3, 19, 78, 1, 54, 27, 74, 1, 12, 1, 40, 24, 60, 19, 90, 1, 18, 4, 44, 1, 96, 23, 46, 33, 36, 1, 72, 21, 72, 35, 50, 25, 12, 1, 24]

cp's OEIS Frontend

A293228 a(n) is the sum of proper divisors of n that are squarefree.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	6
7	1
8	3
9	4
10	8
11	1
12	12
13	1
14	10
15	9
16	3
17	1
18	12
19	1
20	18
21	11
22	14
23	1
24	12
25	6
26	16
27	4
28	24
29	1
30	42
31	1
32	3
33	15
34	20
35	13
36	12
37	1
38	22
39	17
40	18
41	1
42	54
43	1
44	36
45	24
46	26
47	1
48	12
49	8
50	18
51	21
52	42
53	1
54	12
55	17
56	24
57	23
58	32
59	1
60	72
61	1
62	34
63	32
64	3
65	19
66	78
67	1
68	54
69	27
70	74
71	1
72	12
73	1
74	40
75	24
76	60
77	19
78	90
79	1
80	18
81	4
82	44
83	1
84	96
85	23
86	46
87	33
88	36
89	1
90	72
91	21
92	72
93	35
94	50
95	25
96	12
97	1
98	24

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	6
7	1
8	3
9	4
10	8
11	1
12	12
13	1
14	10
15	9
16	3
17	1
18	12
19	1
20	18
21	11
22	14
23	1
24	12
25	6
26	16
27	4
28	24
29	1
30	42
31	1
32	3
33	15
34	20
35	13
36	12
37	1
38	22
39	17
40	18
41	1
42	54
43	1
44	36
45	24
46	26
47	1
48	12
49	8
50	18
51	21
52	42
53	1
54	12
55	17
56	24
57	23
58	32
59	1
60	72
61	1
62	34
63	32
64	3
65	19
66	78
67	1
68	54
69	27
70	74
71	1
72	12
73	1
74	40
75	24
76	60
77	19
78	90
79	1
80	18
81	4
82	44
83	1
84	96
85	23
86	46
87	33
88	36
89	1
90	72
91	21
92	72
93	35
94	50
95	25
96	12
97	1
98	24

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	6
7	1
8	3
9	4
10	8
11	1
12	12
13	1
14	10
15	9
16	3
17	1
18	12
19	1
20	18
21	11
22	14
23	1
24	12
25	6
26	16
27	4
28	24
29	1
30	42
31	1
32	3
33	15
34	20
35	13
36	12
37	1
38	22
39	17
40	18
41	1
42	54
43	1
44	36
45	24
46	26
47	1
48	12
49	8
50	18
51	21
52	42
53	1
54	12
55	17
56	24
57	23
58	32
59	1
60	72
61	1
62	34
63	32
64	3
65	19
66	78
67	1
68	54
69	27
70	74
71	1
72	12
73	1
74	40
75	24
76	60
77	19
78	90
79	1
80	18
81	4
82	44
83	1
84	96
85	23
86	46
87	33
88	36
89	1
90	72
91	21
92	72
93	35
94	50
95	25
96	12
97	1
98	24