A325024 - cp's OEIS frontend

A325024 Multiply-perfect numbers m from A007691 such that m*(m-tau(m))/sigma(m) is not an integer where k-tau(k) is the number of the non-divisors of k (A049820) and sigma(k) is the sum of the divisors of k (A000203).

n	a(n)
1	120
2	523776
3	459818240
4	1476304896
5	31998395520
6	51001180160
7	518666803200
8	30823866178560
9	740344994887680
10	796928461056000
11	212517062615531520
12	69357059049509038080
13	87934476737668055040
14	170206605192656148480
15	1161492388333469337600
16	1802582780370364661760

[120, 523776, 459818240, 1476304896, 31998395520, 51001180160, 518666803200, 30823866178560, 740344994887680, 796928461056000, 212517062615531520, 69357059049509038080, 87934476737668055040, 170206605192656148480, 1161492388333469337600, 1802582780370364661760]

cp's OEIS Frontend

A325024 Multiply-perfect numbers m from A007691 such that m*(m-tau(m))/sigma(m) is not an integer where k-tau(k) is the number of the non-divisors of k (A049820) and sigma(k) is the sum of the divisors of k (A000203).

Table of values

List of values