A124219 - cp's OEIS frontend

A124219 a(n)= m-th positive divisor of n, where phi(n) is number of positive integers which are <= n and are coprime to n, d(n) is the number of positive divisors of n and m = d(n) if d(n)|phi(n), else m = phi(n) mod d(n).

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

[1, 1, 3, 2, 5, 2, 7, 8, 9, 10, 11, 4, 13, 2, 15, 4, 17, 18, 19, 2, 21, 2, 23, 24, 5, 26, 3, 28, 29, 30, 31, 8, 33, 34, 35, 3, 37, 2, 39, 40, 41, 6, 43, 2, 45, 2, 47, 8, 49, 2, 51, 52, 53, 2, 55, 56, 57, 58, 59, 4, 61, 2, 63, 8, 65, 6, 67, 2, 69, 70, 71, 72, 73, 74, 15, 76, 77, 78, 79, 2]

cp's OEIS Frontend

A124219 a(n)= m-th positive divisor of n, where phi(n) is number of positive integers which are <= n and are coprime to n, d(n) is the number of positive divisors of n and m = d(n) if d(n)|phi(n), else m = phi(n) mod d(n).

Table of values

List of values

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

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

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