A049418 - cp's OEIS frontend

A049418 3-i-sigma(n): sum of 3-infinitary divisors of n: if n=Product p(i)^r(i) and d=Product p(i)^s(i), each s(i) has a digit a<=b in its ternary expansion everywhere that the corresponding r(i) has a digit b, then d is a 3-i-divisor of n.

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	9
9	13
10	18
11	12
12	28
13	14
14	24
15	24
16	27
17	18
18	39
19	20
20	42
21	32
22	36
23	24
24	36
25	31
26	42
27	28
28	56
29	30
30	72
31	32
32	63
33	48
34	54
35	48
36	91
37	38
38	60
39	56
40	54
41	42
42	96
43	44
44	84
45	78
46	72
47	48
48	108
49	57
50	93
51	72
52	98
53	54
54	84
55	72
56	72
57	80
58	90
59	60
60	168
61	62
62	96
63	104
64	73
65	84
66	144
67	68
68	126
69	96

[1, 3, 4, 7, 6, 12, 8, 9, 13, 18, 12, 28, 14, 24, 24, 27, 18, 39, 20, 42, 32, 36, 24, 36, 31, 42, 28, 56, 30, 72, 32, 63, 48, 54, 48, 91, 38, 60, 56, 54, 42, 96, 44, 84, 78, 72, 48, 108, 57, 93, 72, 98, 54, 84, 72, 72, 80, 90, 60, 168, 62, 96, 104, 73, 84, 144, 68, 126, 96]

cp's OEIS Frontend

A049418 3-i-sigma(n): sum of 3-infinitary divisors of n: if n=Product p(i)^r(i) and d=Product p(i)^s(i), each s(i) has a digit a<=b in its ternary expansion everywhere that the corresponding r(i) has a digit b, then d is a 3-i-divisor of n.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	9
9	13
10	18
11	12
12	28
13	14
14	24
15	24
16	27
17	18
18	39
19	20
20	42
21	32
22	36
23	24
24	36
25	31
26	42
27	28
28	56
29	30
30	72
31	32
32	63
33	48
34	54
35	48
36	91
37	38
38	60
39	56
40	54
41	42
42	96
43	44
44	84
45	78
46	72
47	48
48	108
49	57
50	93
51	72
52	98
53	54
54	84
55	72
56	72
57	80
58	90
59	60
60	168
61	62
62	96
63	104
64	73
65	84
66	144
67	68
68	126
69	96

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	9
9	13
10	18
11	12
12	28
13	14
14	24
15	24
16	27
17	18
18	39
19	20
20	42
21	32
22	36
23	24
24	36
25	31
26	42
27	28
28	56
29	30
30	72
31	32
32	63
33	48
34	54
35	48
36	91
37	38
38	60
39	56
40	54
41	42
42	96
43	44
44	84
45	78
46	72
47	48
48	108
49	57
50	93
51	72
52	98
53	54
54	84
55	72
56	72
57	80
58	90
59	60
60	168
61	62
62	96
63	104
64	73
65	84
66	144
67	68
68	126
69	96

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	9
9	13
10	18
11	12
12	28
13	14
14	24
15	24
16	27
17	18
18	39
19	20
20	42
21	32
22	36
23	24
24	36
25	31
26	42
27	28
28	56
29	30
30	72
31	32
32	63
33	48
34	54
35	48
36	91
37	38
38	60
39	56
40	54
41	42
42	96
43	44
44	84
45	78
46	72
47	48
48	108
49	57
50	93
51	72
52	98
53	54
54	84
55	72
56	72
57	80
58	90
59	60
60	168
61	62
62	96
63	104
64	73
65	84
66	144
67	68
68	126
69	96