A344589 - cp's OEIS frontend

A344589 Number of divisors d of n for which A011772(d) < A011772(n), where A011772(n) is the smallest number m such that m(m+1)/2 is divisible by n.

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	2
10	2
11	1
12	5
13	1
14	3
15	3
16	4
17	1
18	4
19	1
20	5
21	2
22	3
23	1
24	6
25	2
26	2
27	3
28	3
29	1
30	7
31	1
32	5
33	3
34	2
35	3
36	5
37	1
38	3
39	2
40	5
41	1
42	7
43	1
44	5
45	5
46	3
47	1
48	9
49	2
50	4
51	3
52	5
53	1
54	7
55	2
56	7
57	2
58	2
59	1
60	9
61	1
62	3
63	5
64	6
65	3
66	5
67	1
68	3
69	3
70	7
71	1
72	11
73	1
74	2
75	4
76	5
77	3
78	4
79	1
80	9
81	4
82	2
83	1
84	11
85	3
86	3
87	3
88	6
89	1
90	11
91	3
92	4
93	2
94	3
95	3
96	10
97	1
98	4
99	5
100	6
101	1
102	7
103	1
104	7
105	6

[0, 1, 1, 2, 1, 2, 1, 3, 2, 2, 1, 5, 1, 3, 3, 4, 1, 4, 1, 5, 2, 3, 1, 6, 2, 2, 3, 3, 1, 7, 1, 5, 3, 2, 3, 5, 1, 3, 2, 5, 1, 7, 1, 5, 5, 3, 1, 9, 2, 4, 3, 5, 1, 7, 2, 7, 2, 2, 1, 9, 1, 3, 5, 6, 3, 5, 1, 3, 3, 7, 1, 11, 1, 2, 4, 5, 3, 4, 1, 9, 4, 2, 1, 11, 3, 3, 3, 6, 1, 11, 3, 4, 2, 3, 3, 10, 1, 4, 5, 6, 1, 7, 1, 7, 6]

cp's OEIS Frontend

A344589 Number of divisors d of n for which A011772(d) < A011772(n), where A011772(n) is the smallest number m such that m(m+1)/2 is divisible by n.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	2
10	2
11	1
12	5
13	1
14	3
15	3
16	4
17	1
18	4
19	1
20	5
21	2
22	3
23	1
24	6
25	2
26	2
27	3
28	3
29	1
30	7
31	1
32	5
33	3
34	2
35	3
36	5
37	1
38	3
39	2
40	5
41	1
42	7
43	1
44	5
45	5
46	3
47	1
48	9
49	2
50	4
51	3
52	5
53	1
54	7
55	2
56	7
57	2
58	2
59	1
60	9
61	1
62	3
63	5
64	6
65	3
66	5
67	1
68	3
69	3
70	7
71	1
72	11
73	1
74	2
75	4
76	5
77	3
78	4
79	1
80	9
81	4
82	2
83	1
84	11
85	3
86	3
87	3
88	6
89	1
90	11
91	3
92	4
93	2
94	3
95	3
96	10
97	1
98	4
99	5
100	6
101	1
102	7
103	1
104	7
105	6

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	2
10	2
11	1
12	5
13	1
14	3
15	3
16	4
17	1
18	4
19	1
20	5
21	2
22	3
23	1
24	6
25	2
26	2
27	3
28	3
29	1
30	7
31	1
32	5
33	3
34	2
35	3
36	5
37	1
38	3
39	2
40	5
41	1
42	7
43	1
44	5
45	5
46	3
47	1
48	9
49	2
50	4
51	3
52	5
53	1
54	7
55	2
56	7
57	2
58	2
59	1
60	9
61	1
62	3
63	5
64	6
65	3
66	5
67	1
68	3
69	3
70	7
71	1
72	11
73	1
74	2
75	4
76	5
77	3
78	4
79	1
80	9
81	4
82	2
83	1
84	11
85	3
86	3
87	3
88	6
89	1
90	11
91	3
92	4
93	2
94	3
95	3
96	10
97	1
98	4
99	5
100	6
101	1
102	7
103	1
104	7
105	6

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	2
10	2
11	1
12	5
13	1
14	3
15	3
16	4
17	1
18	4
19	1
20	5
21	2
22	3
23	1
24	6
25	2
26	2
27	3
28	3
29	1
30	7
31	1
32	5
33	3
34	2
35	3
36	5
37	1
38	3
39	2
40	5
41	1
42	7
43	1
44	5
45	5
46	3
47	1
48	9
49	2
50	4
51	3
52	5
53	1
54	7
55	2
56	7
57	2
58	2
59	1
60	9
61	1
62	3
63	5
64	6
65	3
66	5
67	1
68	3
69	3
70	7
71	1
72	11
73	1
74	2
75	4
76	5
77	3
78	4
79	1
80	9
81	4
82	2
83	1
84	11
85	3
86	3
87	3
88	6
89	1
90	11
91	3
92	4
93	2
94	3
95	3
96	10
97	1
98	4
99	5
100	6
101	1
102	7
103	1
104	7
105	6