A351439 - cp's OEIS frontend

A351439 Number of prime factors p of n such that p^(1+valuation(n,p)) divides sigma(n).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	1
23	0
24	0
25	0
26	0
27	0
28	1
29	0
30	2
31	0
32	0
33	0
34	0
35	0
36	0
37	0
38	1
39	0
40	0
41	0
42	1
43	0
44	0
45	0
46	1
47	0
48	0
49	0
50	0
51	1
52	0
53	0
54	1
55	0
56	0
57	0
58	0
59	0
60	1
61	0
62	1
63	0
64	0
65	0
66	2
67	0
68	0
69	0
70	1
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	1
79	0
80	0
81	0
82	0
83	0
84	1
85	0
86	1
87	0
88	0
89	0
90	0
91	0
92	1
93	0
94	1
95	0
96	1
97	0
98	0
99	0
100	0
101	0
102	2
103	0
104	0
105	0
106	0
107	0
108	1

[0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A351439 Number of prime factors p of n such that p^(1+valuation(n,p)) divides sigma(n).

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	1
23	0
24	0
25	0
26	0
27	0
28	1
29	0
30	2
31	0
32	0
33	0
34	0
35	0
36	0
37	0
38	1
39	0
40	0
41	0
42	1
43	0
44	0
45	0
46	1
47	0
48	0
49	0
50	0
51	1
52	0
53	0
54	1
55	0
56	0
57	0
58	0
59	0
60	1
61	0
62	1
63	0
64	0
65	0
66	2
67	0
68	0
69	0
70	1
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	1
79	0
80	0
81	0
82	0
83	0
84	1
85	0
86	1
87	0
88	0
89	0
90	0
91	0
92	1
93	0
94	1
95	0
96	1
97	0
98	0
99	0
100	0
101	0
102	2
103	0
104	0
105	0
106	0
107	0
108	1

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	1
23	0
24	0
25	0
26	0
27	0
28	1
29	0
30	2
31	0
32	0
33	0
34	0
35	0
36	0
37	0
38	1
39	0
40	0
41	0
42	1
43	0
44	0
45	0
46	1
47	0
48	0
49	0
50	0
51	1
52	0
53	0
54	1
55	0
56	0
57	0
58	0
59	0
60	1
61	0
62	1
63	0
64	0
65	0
66	2
67	0
68	0
69	0
70	1
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	1
79	0
80	0
81	0
82	0
83	0
84	1
85	0
86	1
87	0
88	0
89	0
90	0
91	0
92	1
93	0
94	1
95	0
96	1
97	0
98	0
99	0
100	0
101	0
102	2
103	0
104	0
105	0
106	0
107	0
108	1

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	1
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	1
23	0
24	0
25	0
26	0
27	0
28	1
29	0
30	2
31	0
32	0
33	0
34	0
35	0
36	0
37	0
38	1
39	0
40	0
41	0
42	1
43	0
44	0
45	0
46	1
47	0
48	0
49	0
50	0
51	1
52	0
53	0
54	1
55	0
56	0
57	0
58	0
59	0
60	1
61	0
62	1
63	0
64	0
65	0
66	2
67	0
68	0
69	0
70	1
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	1
79	0
80	0
81	0
82	0
83	0
84	1
85	0
86	1
87	0
88	0
89	0
90	0
91	0
92	1
93	0
94	1
95	0
96	1
97	0
98	0
99	0
100	0
101	0
102	2
103	0
104	0
105	0
106	0
107	0
108	1