A326039 - cp's OEIS frontend

A326039 Largest square dividing the sum of divisors of n: a(n) = A008833(sigma(n)).

n	a(n)
1	1
2	1
3	4
4	1
5	1
6	4
7	4
8	1
9	1
10	9
11	4
12	4
13	1
14	4
15	4
16	1
17	9
18	1
19	4
20	1
21	16
22	36
23	4
24	4
25	1
26	1
27	4
28	4
29	1
30	36
31	16
32	9
33	16
34	9
35	16
36	1
37	1
38	4
39	4
40	9
41	1
42	16
43	4
44	4
45	1
46	36
47	16
48	4
49	1
50	1
51	36
52	49
53	9
54	4
55	36
56	4
57	16
58	9
59	4
60	4
61	1
62	16
63	4
64	1
65	4
66	144
67	4
68	9
69	16
70	144
71	36
72	1
73	1
74	1
75	4
76	4
77	16
78	4
79	16
80	1
81	121
82	9
83	4
84	16
85	36
86	4
87	4
88	36
89	9
90	9
91	16
92	4
93	64
94	144
95	4
96	36

[1, 1, 4, 1, 1, 4, 4, 1, 1, 9, 4, 4, 1, 4, 4, 1, 9, 1, 4, 1, 16, 36, 4, 4, 1, 1, 4, 4, 1, 36, 16, 9, 16, 9, 16, 1, 1, 4, 4, 9, 1, 16, 4, 4, 1, 36, 16, 4, 1, 1, 36, 49, 9, 4, 36, 4, 16, 9, 4, 4, 1, 16, 4, 1, 4, 144, 4, 9, 16, 144, 36, 1, 1, 1, 4, 4, 16, 4, 16, 1, 121, 9, 4, 16, 36, 4, 4, 36, 9, 9, 16, 4, 64, 144, 4, 36]

cp's OEIS Frontend

A326039 Largest square dividing the sum of divisors of n: a(n) = A008833(sigma(n)).

Table of values

List of values

n	a(n)
1	1
2	1
3	4
4	1
5	1
6	4
7	4
8	1
9	1
10	9
11	4
12	4
13	1
14	4
15	4
16	1
17	9
18	1
19	4
20	1
21	16
22	36
23	4
24	4
25	1
26	1
27	4
28	4
29	1
30	36
31	16
32	9
33	16
34	9
35	16
36	1
37	1
38	4
39	4
40	9
41	1
42	16
43	4
44	4
45	1
46	36
47	16
48	4
49	1
50	1
51	36
52	49
53	9
54	4
55	36
56	4
57	16
58	9
59	4
60	4
61	1
62	16
63	4
64	1
65	4
66	144
67	4
68	9
69	16
70	144
71	36
72	1
73	1
74	1
75	4
76	4
77	16
78	4
79	16
80	1
81	121
82	9
83	4
84	16
85	36
86	4
87	4
88	36
89	9
90	9
91	16
92	4
93	64
94	144
95	4
96	36

n	a(n)
1	1
2	1
3	4
4	1
5	1
6	4
7	4
8	1
9	1
10	9
11	4
12	4
13	1
14	4
15	4
16	1
17	9
18	1
19	4
20	1
21	16
22	36
23	4
24	4
25	1
26	1
27	4
28	4
29	1
30	36
31	16
32	9
33	16
34	9
35	16
36	1
37	1
38	4
39	4
40	9
41	1
42	16
43	4
44	4
45	1
46	36
47	16
48	4
49	1
50	1
51	36
52	49
53	9
54	4
55	36
56	4
57	16
58	9
59	4
60	4
61	1
62	16
63	4
64	1
65	4
66	144
67	4
68	9
69	16
70	144
71	36
72	1
73	1
74	1
75	4
76	4
77	16
78	4
79	16
80	1
81	121
82	9
83	4
84	16
85	36
86	4
87	4
88	36
89	9
90	9
91	16
92	4
93	64
94	144
95	4
96	36

n	a(n)
1	1
2	1
3	4
4	1
5	1
6	4
7	4
8	1
9	1
10	9
11	4
12	4
13	1
14	4
15	4
16	1
17	9
18	1
19	4
20	1
21	16
22	36
23	4
24	4
25	1
26	1
27	4
28	4
29	1
30	36
31	16
32	9
33	16
34	9
35	16
36	1
37	1
38	4
39	4
40	9
41	1
42	16
43	4
44	4
45	1
46	36
47	16
48	4
49	1
50	1
51	36
52	49
53	9
54	4
55	36
56	4
57	16
58	9
59	4
60	4
61	1
62	16
63	4
64	1
65	4
66	144
67	4
68	9
69	16
70	144
71	36
72	1
73	1
74	1
75	4
76	4
77	16
78	4
79	16
80	1
81	121
82	9
83	4
84	16
85	36
86	4
87	4
88	36
89	9
90	9
91	16
92	4
93	64
94	144
95	4
96	36