A359260 - cp's OEIS frontend

A359260 Numbers m such that the arithmetic mean of the first k divisors of m is an integer for all k in 1..d(m), where d(m) = A000005(m).

n	a(n)
1	1
2	3
3	5
4	7
5	11
6	13
7	15
8	17
9	19
10	23
11	29
12	31
13	33
14	37
15	41
16	43
17	47
18	49
19	51
20	53
21	59
22	61
23	67
24	69
25	71
26	73
27	79
28	83
29	87
30	89
31	91
32	97
33	101
34	103
35	107
36	109
37	113
38	123
39	127
40	131
41	133
42	137
43	139
44	141
45	149
46	151
47	157
48	159
49	163
50	167
51	169
52	173
53	177
54	179
55	181
56	191
57	193
58	197
59	199
60	211

[1, 3, 5, 7, 11, 13, 15, 17, 19, 23, 29, 31, 33, 37, 41, 43, 47, 49, 51, 53, 59, 61, 67, 69, 71, 73, 79, 83, 87, 89, 91, 97, 101, 103, 107, 109, 113, 123, 127, 131, 133, 137, 139, 141, 149, 151, 157, 159, 163, 167, 169, 173, 177, 179, 181, 191, 193, 197, 199, 211]

cp's OEIS Frontend

A359260 Numbers m such that the arithmetic mean of the first k divisors of m is an integer for all k in 1..d(m), where d(m) = A000005(m).

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	11
6	13
7	15
8	17
9	19
10	23
11	29
12	31
13	33
14	37
15	41
16	43
17	47
18	49
19	51
20	53
21	59
22	61
23	67
24	69
25	71
26	73
27	79
28	83
29	87
30	89
31	91
32	97
33	101
34	103
35	107
36	109
37	113
38	123
39	127
40	131
41	133
42	137
43	139
44	141
45	149
46	151
47	157
48	159
49	163
50	167
51	169
52	173
53	177
54	179
55	181
56	191
57	193
58	197
59	199
60	211

n	a(n)
1	1
2	3
3	5
4	7
5	11
6	13
7	15
8	17
9	19
10	23
11	29
12	31
13	33
14	37
15	41
16	43
17	47
18	49
19	51
20	53
21	59
22	61
23	67
24	69
25	71
26	73
27	79
28	83
29	87
30	89
31	91
32	97
33	101
34	103
35	107
36	109
37	113
38	123
39	127
40	131
41	133
42	137
43	139
44	141
45	149
46	151
47	157
48	159
49	163
50	167
51	169
52	173
53	177
54	179
55	181
56	191
57	193
58	197
59	199
60	211

n	a(n)
1	1
2	3
3	5
4	7
5	11
6	13
7	15
8	17
9	19
10	23
11	29
12	31
13	33
14	37
15	41
16	43
17	47
18	49
19	51
20	53
21	59
22	61
23	67
24	69
25	71
26	73
27	79
28	83
29	87
30	89
31	91
32	97
33	101
34	103
35	107
36	109
37	113
38	123
39	127
40	131
41	133
42	137
43	139
44	141
45	149
46	151
47	157
48	159
49	163
50	167
51	169
52	173
53	177
54	179
55	181
56	191
57	193
58	197
59	199
60	211