A124331 - cp's OEIS frontend

A124331 a(n) is the ((phi(n) mod d(n)) + 1)-th positive divisor of n, where phi(n) is number of positive integers which are <= n and are coprime to n and d(n) is the number of positive divisors of n.

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

[1, 2, 1, 4, 1, 3, 1, 1, 1, 1, 1, 6, 1, 7, 1, 8, 1, 1, 1, 4, 1, 11, 1, 1, 25, 1, 9, 1, 1, 1, 1, 16, 1, 1, 1, 4, 1, 19, 1, 1, 1, 7, 1, 4, 1, 23, 1, 12, 1, 5, 1, 1, 1, 3, 1, 1, 1, 1, 1, 5, 1, 31, 1, 16, 1, 11, 1, 4, 1, 1, 1, 1, 1, 1, 25, 1, 1, 1, 1, 4, 81, 1, 1, 1, 1, 43, 1, 1, 1, 1, 1, 4, 1, 47, 1, 24, 1, 1, 1]

cp's OEIS Frontend

A124331 a(n) is the ((phi(n) mod d(n)) + 1)-th positive divisor of n, where phi(n) is number of positive integers which are <= n and are coprime to n and d(n) is the number of positive divisors of n.

Table of values

List of values

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

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

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