A049645 - cp's OEIS frontend

A049645 Numbers k such that the square of the number of divisors of k divides the sum of the divisors of k.

n	a(n)
1	1
2	3
3	7
4	11
5	19
6	21
7	23
8	31
9	33
10	35
11	43
12	47
13	57
14	59
15	62
16	67
17	69
18	71
19	77
20	79
21	83
22	91
23	93
24	94
25	103
26	105
27	107
28	115
29	119
30	127
31	129
32	131
33	133
34	139
35	141
36	151
37	155
38	158
39	161
40	163
41	167
42	177
43	179
44	186
45	189
46	191
47	199
48	201
49	203
50	209
51	211
52	213
53	217
54	223

[1, 3, 7, 11, 19, 21, 23, 31, 33, 35, 43, 47, 57, 59, 62, 67, 69, 71, 77, 79, 83, 91, 93, 94, 103, 105, 107, 115, 119, 127, 129, 131, 133, 139, 141, 151, 155, 158, 161, 163, 167, 177, 179, 186, 189, 191, 199, 201, 203, 209, 211, 213, 217, 223]

cp's OEIS Frontend

A049645 Numbers k such that the square of the number of divisors of k divides the sum of the divisors of k.

Table of values

List of values

n	a(n)
1	1
2	3
3	7
4	11
5	19
6	21
7	23
8	31
9	33
10	35
11	43
12	47
13	57
14	59
15	62
16	67
17	69
18	71
19	77
20	79
21	83
22	91
23	93
24	94
25	103
26	105
27	107
28	115
29	119
30	127
31	129
32	131
33	133
34	139
35	141
36	151
37	155
38	158
39	161
40	163
41	167
42	177
43	179
44	186
45	189
46	191
47	199
48	201
49	203
50	209
51	211
52	213
53	217
54	223

n	a(n)
1	1
2	3
3	7
4	11
5	19
6	21
7	23
8	31
9	33
10	35
11	43
12	47
13	57
14	59
15	62
16	67
17	69
18	71
19	77
20	79
21	83
22	91
23	93
24	94
25	103
26	105
27	107
28	115
29	119
30	127
31	129
32	131
33	133
34	139
35	141
36	151
37	155
38	158
39	161
40	163
41	167
42	177
43	179
44	186
45	189
46	191
47	199
48	201
49	203
50	209
51	211
52	213
53	217
54	223

n	a(n)
1	1
2	3
3	7
4	11
5	19
6	21
7	23
8	31
9	33
10	35
11	43
12	47
13	57
14	59
15	62
16	67
17	69
18	71
19	77
20	79
21	83
22	91
23	93
24	94
25	103
26	105
27	107
28	115
29	119
30	127
31	129
32	131
33	133
34	139
35	141
36	151
37	155
38	158
39	161
40	163
41	167
42	177
43	179
44	186
45	189
46	191
47	199
48	201
49	203
50	209
51	211
52	213
53	217
54	223