A051378 - cp's OEIS frontend

A051378 Sum of (1+e)-divisors of n. Let n = Product_i p(i)^r(i) then (1+e)-sigma(n) = Product_i (1 + Sum_{s|r(i)} p(i)^s).

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	11
9	13
10	18
11	12
12	28
13	14
14	24
15	24
16	23
17	18
18	39
19	20
20	42
21	32
22	36
23	24
24	44
25	31
26	42
27	31
28	56
29	30
30	72
31	32
32	35
33	48
34	54
35	48
36	91
37	38
38	60
39	56
40	66
41	42
42	96
43	44
44	84
45	78
46	72
47	48
48	92
49	57
50	93
51	72
52	98
53	54
54	93
55	72
56	88
57	80
58	90
59	60
60	168
61	62
62	96
63	104
64	79
65	84
66	144
67	68
68	126
69	96

[1, 3, 4, 7, 6, 12, 8, 11, 13, 18, 12, 28, 14, 24, 24, 23, 18, 39, 20, 42, 32, 36, 24, 44, 31, 42, 31, 56, 30, 72, 32, 35, 48, 54, 48, 91, 38, 60, 56, 66, 42, 96, 44, 84, 78, 72, 48, 92, 57, 93, 72, 98, 54, 93, 72, 88, 80, 90, 60, 168, 62, 96, 104, 79, 84, 144, 68, 126, 96]

cp's OEIS Frontend

A051378 Sum of (1+e)-divisors of n. Let n = Product_i p(i)^r(i) then (1+e)-sigma(n) = Product_i (1 + Sum_{s|r(i)} p(i)^s).

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	11
9	13
10	18
11	12
12	28
13	14
14	24
15	24
16	23
17	18
18	39
19	20
20	42
21	32
22	36
23	24
24	44
25	31
26	42
27	31
28	56
29	30
30	72
31	32
32	35
33	48
34	54
35	48
36	91
37	38
38	60
39	56
40	66
41	42
42	96
43	44
44	84
45	78
46	72
47	48
48	92
49	57
50	93
51	72
52	98
53	54
54	93
55	72
56	88
57	80
58	90
59	60
60	168
61	62
62	96
63	104
64	79
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	11
9	13
10	18
11	12
12	28
13	14
14	24
15	24
16	23
17	18
18	39
19	20
20	42
21	32
22	36
23	24
24	44
25	31
26	42
27	31
28	56
29	30
30	72
31	32
32	35
33	48
34	54
35	48
36	91
37	38
38	60
39	56
40	66
41	42
42	96
43	44
44	84
45	78
46	72
47	48
48	92
49	57
50	93
51	72
52	98
53	54
54	93
55	72
56	88
57	80
58	90
59	60
60	168
61	62
62	96
63	104
64	79
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	11
9	13
10	18
11	12
12	28
13	14
14	24
15	24
16	23
17	18
18	39
19	20
20	42
21	32
22	36
23	24
24	44
25	31
26	42
27	31
28	56
29	30
30	72
31	32
32	35
33	48
34	54
35	48
36	91
37	38
38	60
39	56
40	66
41	42
42	96
43	44
44	84
45	78
46	72
47	48
48	92
49	57
50	93
51	72
52	98
53	54
54	93
55	72
56	88
57	80
58	90
59	60
60	168
61	62
62	96
63	104
64	79
65	84
66	144
67	68
68	126
69	96