A341879 - cp's OEIS frontend

A341879 a(n) is the largest d(k) such that sigma(k) = n, where d is the number of divisor function and sigma is the sum of divisors function.

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

[1, 0, 2, 2, 0, 2, 3, 2, 0, 0, 0, 4, 3, 2, 4, 0, 0, 4, 0, 2, 0, 0, 0, 4, 0, 0, 0, 6, 0, 2, 5, 4, 0, 0, 0, 4, 0, 2, 6, 4, 0, 6, 0, 2, 0, 0, 0, 4, 0, 0, 0, 0, 0, 4, 0, 6, 3, 0, 0, 8, 0, 2, 6, 0, 0, 0, 0, 2, 0, 0, 0, 8, 0, 2, 0, 0, 0, 6, 0, 4, 0, 0, 0, 6, 0, 0, 0, 0, 0, 8, 9, 0, 6, 0, 0, 8, 0, 6, 0, 0, 0, 2, 0, 6, 0]

cp's OEIS Frontend

A341879 a(n) is the largest d(k) such that sigma(k) = n, where d is the number of divisor function and sigma is the sum of divisors function.

Table of values

List of values

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

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

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