A191868 - cp's OEIS frontend

A191868 Numbers n such that (product of divisors of 2n) mod (sum of divisors of 2n) is equal to number of divisors of 2n.

n	a(n)
1	1
2	4
3	7
4	13
5	19
6	31
7	37
8	43
9	61
10	67
11	73
12	79
13	97
14	103
15	109
16	127
17	139
18	151
19	157
20	163
21	181
22	193
23	199
24	211
25	223
26	229
27	241
28	271
29	277
30	283
31	307
32	313
33	331
34	337
35	349
36	367
37	373
38	379
39	397
40	409
41	421
42	433
43	439
44	448
45	457
46	463
47	487
48	499
49	523
50	541

[1, 4, 7, 13, 19, 31, 37, 43, 61, 67, 73, 79, 97, 103, 109, 127, 139, 151, 157, 163, 181, 193, 199, 211, 223, 229, 241, 271, 277, 283, 307, 313, 331, 337, 349, 367, 373, 379, 397, 409, 421, 433, 439, 448, 457, 463, 487, 499, 523, 541]

cp's OEIS Frontend

A191868 Numbers n such that (product of divisors of 2n) mod (sum of divisors of 2n) is equal to number of divisors of 2n.

Table of values

List of values

n	a(n)
1	1
2	4
3	7
4	13
5	19
6	31
7	37
8	43
9	61
10	67
11	73
12	79
13	97
14	103
15	109
16	127
17	139
18	151
19	157
20	163
21	181
22	193
23	199
24	211
25	223
26	229
27	241
28	271
29	277
30	283
31	307
32	313
33	331
34	337
35	349
36	367
37	373
38	379
39	397
40	409
41	421
42	433
43	439
44	448
45	457
46	463
47	487
48	499
49	523
50	541

n	a(n)
1	1
2	4
3	7
4	13
5	19
6	31
7	37
8	43
9	61
10	67
11	73
12	79
13	97
14	103
15	109
16	127
17	139
18	151
19	157
20	163
21	181
22	193
23	199
24	211
25	223
26	229
27	241
28	271
29	277
30	283
31	307
32	313
33	331
34	337
35	349
36	367
37	373
38	379
39	397
40	409
41	421
42	433
43	439
44	448
45	457
46	463
47	487
48	499
49	523
50	541

n	a(n)
1	1
2	4
3	7
4	13
5	19
6	31
7	37
8	43
9	61
10	67
11	73
12	79
13	97
14	103
15	109
16	127
17	139
18	151
19	157
20	163
21	181
22	193
23	199
24	211
25	223
26	229
27	241
28	271
29	277
30	283
31	307
32	313
33	331
34	337
35	349
36	367
37	373
38	379
39	397
40	409
41	421
42	433
43	439
44	448
45	457
46	463
47	487
48	499
49	523
50	541