A309621 - cp's OEIS frontend

A309621 Numbers k such that the number of divisors of k is equal to the number of power-of-two-divisors of the sum of divisors of k.

n	a(n)
1	1
2	5
3	13
4	14
5	15
6	17
7	27
8	29
9	37
10	39
11	41
12	46
13	51
14	53
15	55
16	61
17	73
18	87
19	89
20	95
21	97
22	101
23	109
24	111
25	113
26	123
27	124
28	137
29	142
30	143
31	149
32	157
33	159
34	173
35	181
36	183
37	186
38	187
39	193
40	197
41	206
42	215
43	219
44	229
45	231
46	233
47	241
48	247
49	257
50	267
51	269
52	277
53	279
54	281
55	291
56	293
57	295
58	302
59	303
60	313
61	317
62	319
63	323

[1, 5, 13, 14, 15, 17, 27, 29, 37, 39, 41, 46, 51, 53, 55, 61, 73, 87, 89, 95, 97, 101, 109, 111, 113, 123, 124, 137, 142, 143, 149, 157, 159, 173, 181, 183, 186, 187, 193, 197, 206, 215, 219, 229, 231, 233, 241, 247, 257, 267, 269, 277, 279, 281, 291, 293, 295, 302, 303, 313, 317, 319, 323]

cp's OEIS Frontend

A309621 Numbers k such that the number of divisors of k is equal to the number of power-of-two-divisors of the sum of divisors of k.

Table of values

List of values

n	a(n)
1	1
2	5
3	13
4	14
5	15
6	17
7	27
8	29
9	37
10	39
11	41
12	46
13	51
14	53
15	55
16	61
17	73
18	87
19	89
20	95
21	97
22	101
23	109
24	111
25	113
26	123
27	124
28	137
29	142
30	143
31	149
32	157
33	159
34	173
35	181
36	183
37	186
38	187
39	193
40	197
41	206
42	215
43	219
44	229
45	231
46	233
47	241
48	247
49	257
50	267
51	269
52	277
53	279
54	281
55	291
56	293
57	295
58	302
59	303
60	313
61	317
62	319
63	323

n	a(n)
1	1
2	5
3	13
4	14
5	15
6	17
7	27
8	29
9	37
10	39
11	41
12	46
13	51
14	53
15	55
16	61
17	73
18	87
19	89
20	95
21	97
22	101
23	109
24	111
25	113
26	123
27	124
28	137
29	142
30	143
31	149
32	157
33	159
34	173
35	181
36	183
37	186
38	187
39	193
40	197
41	206
42	215
43	219
44	229
45	231
46	233
47	241
48	247
49	257
50	267
51	269
52	277
53	279
54	281
55	291
56	293
57	295
58	302
59	303
60	313
61	317
62	319
63	323

n	a(n)
1	1
2	5
3	13
4	14
5	15
6	17
7	27
8	29
9	37
10	39
11	41
12	46
13	51
14	53
15	55
16	61
17	73
18	87
19	89
20	95
21	97
22	101
23	109
24	111
25	113
26	123
27	124
28	137
29	142
30	143
31	149
32	157
33	159
34	173
35	181
36	183
37	186
38	187
39	193
40	197
41	206
42	215
43	219
44	229
45	231
46	233
47	241
48	247
49	257
50	267
51	269
52	277
53	279
54	281
55	291
56	293
57	295
58	302
59	303
60	313
61	317
62	319
63	323