A272008 - cp's OEIS frontend

A272008 a(n) is the numerator of the fractional part of sigma(n)/n, where sigma(n) is the sum of the divisors of n.

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	0
7	1
8	7
9	4
10	4
11	1
12	1
13	1
14	5
15	3
16	15
17	1
18	1
19	1
20	1
21	11
22	7
23	1
24	1
25	6
26	8
27	13
28	0
29	1
30	2
31	1
32	31
33	5
34	10
35	13
36	19
37	1
38	11
39	17
40	1
41	1
42	2
43	1
44	10
45	11
46	13
47	1
48	7
49	8
50	43
51	7
52	23
53	1
54	2
55	17
56	1
57	23
58	16
59	1
60	4
61	1
62	17
63	41
64	63
65	19
66	2
67	1
68	29
69	9
70	2
71	1
72	17
73	1
74	20
75	49
76	16
77	19
78	2
79	1
80	13
81	40

[0, 1, 1, 3, 1, 0, 1, 7, 4, 4, 1, 1, 1, 5, 3, 15, 1, 1, 1, 1, 11, 7, 1, 1, 6, 8, 13, 0, 1, 2, 1, 31, 5, 10, 13, 19, 1, 11, 17, 1, 1, 2, 1, 10, 11, 13, 1, 7, 8, 43, 7, 23, 1, 2, 17, 1, 23, 16, 1, 4, 1, 17, 41, 63, 19, 2, 1, 29, 9, 2, 1, 17, 1, 20, 49, 16, 19, 2, 1, 13, 40]

cp's OEIS Frontend

A272008 a(n) is the numerator of the fractional part of sigma(n)/n, where sigma(n) is the sum of the divisors of n.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	0
7	1
8	7
9	4
10	4
11	1
12	1
13	1
14	5
15	3
16	15
17	1
18	1
19	1
20	1
21	11
22	7
23	1
24	1
25	6
26	8
27	13
28	0
29	1
30	2
31	1
32	31
33	5
34	10
35	13
36	19
37	1
38	11
39	17
40	1
41	1
42	2
43	1
44	10
45	11
46	13
47	1
48	7
49	8
50	43
51	7
52	23
53	1
54	2
55	17
56	1
57	23
58	16
59	1
60	4
61	1
62	17
63	41
64	63
65	19
66	2
67	1
68	29
69	9
70	2
71	1
72	17
73	1
74	20
75	49
76	16
77	19
78	2
79	1
80	13
81	40

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	0
7	1
8	7
9	4
10	4
11	1
12	1
13	1
14	5
15	3
16	15
17	1
18	1
19	1
20	1
21	11
22	7
23	1
24	1
25	6
26	8
27	13
28	0
29	1
30	2
31	1
32	31
33	5
34	10
35	13
36	19
37	1
38	11
39	17
40	1
41	1
42	2
43	1
44	10
45	11
46	13
47	1
48	7
49	8
50	43
51	7
52	23
53	1
54	2
55	17
56	1
57	23
58	16
59	1
60	4
61	1
62	17
63	41
64	63
65	19
66	2
67	1
68	29
69	9
70	2
71	1
72	17
73	1
74	20
75	49
76	16
77	19
78	2
79	1
80	13
81	40

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	0
7	1
8	7
9	4
10	4
11	1
12	1
13	1
14	5
15	3
16	15
17	1
18	1
19	1
20	1
21	11
22	7
23	1
24	1
25	6
26	8
27	13
28	0
29	1
30	2
31	1
32	31
33	5
34	10
35	13
36	19
37	1
38	11
39	17
40	1
41	1
42	2
43	1
44	10
45	11
46	13
47	1
48	7
49	8
50	43
51	7
52	23
53	1
54	2
55	17
56	1
57	23
58	16
59	1
60	4
61	1
62	17
63	41
64	63
65	19
66	2
67	1
68	29
69	9
70	2
71	1
72	17
73	1
74	20
75	49
76	16
77	19
78	2
79	1
80	13
81	40