A125747 - cp's OEIS frontend

A125747 a(n) is the smallest positive integer such that (Sum_{t(k)|n, 1 <= k <= a(n)} t(k)) >= n, where t(k) is the k-th positive divisor of n.

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	2
8	4
9	3
10	4
11	2
12	5
13	2
14	4
15	4
16	5
17	2
18	5
19	2
20	5
21	4
22	4
23	2
24	6
25	3
26	4
27	4
28	5
29	2
30	7
31	2
32	6
33	4
34	4
35	4
36	7
37	2
38	4
39	4
40	7
41	2
42	7
43	2
44	6
45	6
46	4
47	2
48	8
49	3
50	6
51	4
52	6
53	2
54	7
55	4
56	7
57	4
58	4
59	2
60	10
61	2
62	4
63	6
64	7
65	4
66	7
67	2
68	6
69	4
70	7
71	2
72	10
73	2
74	4
75	6
76	6
77	4
78	7
79	2
80	9
81	5
82	4
83	2
84	10
85	4
86	4
87	4
88	7
89	2
90	10
91	4
92	6
93	4
94	4
95	4
96	10
97	2
98	6
99	6
100	8
101	2
102	7
103	2

[1, 2, 2, 3, 2, 3, 2, 4, 3, 4, 2, 5, 2, 4, 4, 5, 2, 5, 2, 5, 4, 4, 2, 6, 3, 4, 4, 5, 2, 7, 2, 6, 4, 4, 4, 7, 2, 4, 4, 7, 2, 7, 2, 6, 6, 4, 2, 8, 3, 6, 4, 6, 2, 7, 4, 7, 4, 4, 2, 10, 2, 4, 6, 7, 4, 7, 2, 6, 4, 7, 2, 10, 2, 4, 6, 6, 4, 7, 2, 9, 5, 4, 2, 10, 4, 4, 4, 7, 2, 10, 4, 6, 4, 4, 4, 10, 2, 6, 6, 8, 2, 7, 2]

cp's OEIS Frontend

A125747 a(n) is the smallest positive integer such that (Sum_{t(k)|n, 1 <= k <= a(n)} t(k)) >= n, where t(k) is the k-th positive divisor of n.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	2
8	4
9	3
10	4
11	2
12	5
13	2
14	4
15	4
16	5
17	2
18	5
19	2
20	5
21	4
22	4
23	2
24	6
25	3
26	4
27	4
28	5
29	2
30	7
31	2
32	6
33	4
34	4
35	4
36	7
37	2
38	4
39	4
40	7
41	2
42	7
43	2
44	6
45	6
46	4
47	2
48	8
49	3
50	6
51	4
52	6
53	2
54	7
55	4
56	7
57	4
58	4
59	2
60	10
61	2
62	4
63	6
64	7
65	4
66	7
67	2
68	6
69	4
70	7
71	2
72	10
73	2
74	4
75	6
76	6
77	4
78	7
79	2
80	9
81	5
82	4
83	2
84	10
85	4
86	4
87	4
88	7
89	2
90	10
91	4
92	6
93	4
94	4
95	4
96	10
97	2
98	6
99	6
100	8
101	2
102	7
103	2

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	2
8	4
9	3
10	4
11	2
12	5
13	2
14	4
15	4
16	5
17	2
18	5
19	2
20	5
21	4
22	4
23	2
24	6
25	3
26	4
27	4
28	5
29	2
30	7
31	2
32	6
33	4
34	4
35	4
36	7
37	2
38	4
39	4
40	7
41	2
42	7
43	2
44	6
45	6
46	4
47	2
48	8
49	3
50	6
51	4
52	6
53	2
54	7
55	4
56	7
57	4
58	4
59	2
60	10
61	2
62	4
63	6
64	7
65	4
66	7
67	2
68	6
69	4
70	7
71	2
72	10
73	2
74	4
75	6
76	6
77	4
78	7
79	2
80	9
81	5
82	4
83	2
84	10
85	4
86	4
87	4
88	7
89	2
90	10
91	4
92	6
93	4
94	4
95	4
96	10
97	2
98	6
99	6
100	8
101	2
102	7
103	2

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	2
8	4
9	3
10	4
11	2
12	5
13	2
14	4
15	4
16	5
17	2
18	5
19	2
20	5
21	4
22	4
23	2
24	6
25	3
26	4
27	4
28	5
29	2
30	7
31	2
32	6
33	4
34	4
35	4
36	7
37	2
38	4
39	4
40	7
41	2
42	7
43	2
44	6
45	6
46	4
47	2
48	8
49	3
50	6
51	4
52	6
53	2
54	7
55	4
56	7
57	4
58	4
59	2
60	10
61	2
62	4
63	6
64	7
65	4
66	7
67	2
68	6
69	4
70	7
71	2
72	10
73	2
74	4
75	6
76	6
77	4
78	7
79	2
80	9
81	5
82	4
83	2
84	10
85	4
86	4
87	4
88	7
89	2
90	10
91	4
92	6
93	4
94	4
95	4
96	10
97	2
98	6
99	6
100	8
101	2
102	7
103	2