A350743 - cp's OEIS frontend

A350743 Number of numbers k, 1 <= k <= n, such that k | sigma_k(n).

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

[1, 1, 2, 1, 3, 3, 2, 3, 1, 5, 4, 5, 4, 5, 6, 1, 5, 4, 3, 7, 4, 5, 5, 8, 1, 7, 6, 6, 8, 9, 3, 5, 8, 7, 9, 3, 4, 10, 6, 13, 7, 8, 4, 8, 9, 7, 9, 5, 3, 5, 10, 10, 7, 13, 8, 14, 8, 12, 10, 18, 3, 10, 7, 1, 14, 10, 5, 16, 11, 12, 5, 12, 6, 9, 10, 10, 8, 14, 5, 11, 2, 13, 13, 15, 14]

cp's OEIS Frontend

A350743 Number of numbers k, 1 <= k <= n, such that k | sigma_k(n).

Table of values

List of values

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

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

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