A379130 - cp's OEIS frontend

A379130 a(n) is the number of unitary divisors d of n for which A048720(A065621(sigma(d)),sigma(n/d)) is equal to sigma(n).

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

[1, 1, 2, 1, 1, 2, 2, 1, 1, 3, 1, 2, 1, 2, 2, 1, 1, 1, 1, 2, 4, 3, 1, 2, 1, 2, 1, 2, 1, 6, 2, 1, 2, 1, 2, 1, 1, 1, 2, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 2, 2, 3, 1, 1, 3, 2, 2, 2, 1, 4, 1, 2, 2, 1, 2, 6, 1, 1, 2, 6, 1, 2, 1, 1, 2, 2, 2, 4, 1, 2, 1, 1, 1, 4, 1, 2, 2, 2, 1, 1, 2, 2, 4, 3, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 4]

cp's OEIS Frontend

A379130 a(n) is the number of unitary divisors d of n for which A048720(A065621(sigma(d)),sigma(n/d)) is equal to sigma(n).

Table of values

List of values

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

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

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