A336613 - cp's OEIS frontend

A336613 Numbers m such that tau(sigma(m)) divides m, where tau(m) is the number of divisors function (A000005) and sigma(m) is the sum of divisors function (A000203).

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	12
8	16
9	24
10	36
11	48
12	64
13	72
14	80
15	81
16	84
17	100
18	112
19	120
20	128
21	140
22	144
23	156
24	160
25	162
26	168
27	192
28	198
29	200
30	208
31	210
32	216
33	240
34	256
35	270
36	288
37	300
38	320
39	324
40	336
41	357
42	360
43	368
44	384
45	390
46	420
47	432
48	448
49	464
50	468
51	480
52	512
53	560
54	576
55	592
56	600
57	624
58	630

[1, 2, 3, 4, 6, 8, 12, 16, 24, 36, 48, 64, 72, 80, 81, 84, 100, 112, 120, 128, 140, 144, 156, 160, 162, 168, 192, 198, 200, 208, 210, 216, 240, 256, 270, 288, 300, 320, 324, 336, 357, 360, 368, 384, 390, 420, 432, 448, 464, 468, 480, 512, 560, 576, 592, 600, 624, 630]

cp's OEIS Frontend

A336613 Numbers m such that tau(sigma(m)) divides m, where tau(m) is the number of divisors function (A000005) and sigma(m) is the sum of divisors function (A000203).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	12
8	16
9	24
10	36
11	48
12	64
13	72
14	80
15	81
16	84
17	100
18	112
19	120
20	128
21	140
22	144
23	156
24	160
25	162
26	168
27	192
28	198
29	200
30	208
31	210
32	216
33	240
34	256
35	270
36	288
37	300
38	320
39	324
40	336
41	357
42	360
43	368
44	384
45	390
46	420
47	432
48	448
49	464
50	468
51	480
52	512
53	560
54	576
55	592
56	600
57	624
58	630

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	12
8	16
9	24
10	36
11	48
12	64
13	72
14	80
15	81
16	84
17	100
18	112
19	120
20	128
21	140
22	144
23	156
24	160
25	162
26	168
27	192
28	198
29	200
30	208
31	210
32	216
33	240
34	256
35	270
36	288
37	300
38	320
39	324
40	336
41	357
42	360
43	368
44	384
45	390
46	420
47	432
48	448
49	464
50	468
51	480
52	512
53	560
54	576
55	592
56	600
57	624
58	630

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	12
8	16
9	24
10	36
11	48
12	64
13	72
14	80
15	81
16	84
17	100
18	112
19	120
20	128
21	140
22	144
23	156
24	160
25	162
26	168
27	192
28	198
29	200
30	208
31	210
32	216
33	240
34	256
35	270
36	288
37	300
38	320
39	324
40	336
41	357
42	360
43	368
44	384
45	390
46	420
47	432
48	448
49	464
50	468
51	480
52	512
53	560
54	576
55	592
56	600
57	624
58	630