A264154 - cp's OEIS frontend

A264154 For numbers m such that rad(n) divides sigma(n), this sequence gives the minimum exponent k such that sigma(m)^k divides m.

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

[1, 1, 2, 1, 3, 3, 3, 1, 3, 3, 2, 2, 2, 3, 4, 5, 1, 3, 2, 2, 7, 1, 2, 4, 3, 3, 2, 3, 3, 2, 5, 2, 2, 3, 3, 5, 2, 3, 7, 3, 3, 3, 5, 3, 4, 2, 5, 3, 2, 7, 2, 3, 3, 3, 5, 2, 7, 2, 6, 2, 5, 3, 2, 3, 3, 2, 3, 1, 3, 3, 4, 3, 11, 4, 7, 3, 2, 2, 5, 3, 3, 5, 3, 4, 4, 7, 4]

cp's OEIS Frontend

A264154 For numbers m such that rad(n) divides sigma(n), this sequence gives the minimum exponent k such that sigma(m)^k divides m.

Table of values

List of values

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

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

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