621781839

素因数分解:

$3^5\times 7^1\times {\mathrm{23}}^2\times {\mathrm{691}}^1$

素因数の和:759

約数の個数: 72

約数和(自身を含む): 1114352512

約数和(自身を除く): 492570673

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 243, 483, 529, 567, 621, 691, 1449, 1587, 1701, 1863, 2073, 3703, 4347, 4761, 4837, 5589, 6219, 11109, 13041, 14283, 14511, 15893, 18657, 33327, 39123, 42849, 43533, 47679, 55971, 99981, 111251, 128547, 130599, 143037, 167913, 299943, 333753, 365539, 391797, 429111, 899829, 1001259, 1096617, 1175391, 1287333, 2558773, 3003777, 3289851, 3861999, 7676319, 9011331, 9869553, 23028957, 27033993, 29608659, 69086871, 88825977, 207260613, 621781839]

約数ペア:

[(1, 621781839), (3, 207260613), (7, 88825977), (9, 69086871), (21, 29608659), (23, 27033993), (27, 23028957), (63, 9869553), (69, 9011331), (81, 7676319), (161, 3861999), (189, 3289851), (207, 3003777), (243, 2558773), (483, 1287333), (529, 1175391), (567, 1096617), (621, 1001259), (691, 899829), (1449, 429111), (1587, 391797), (1701, 365539), (1863, 333753), (2073, 299943), (3703, 167913), (4347, 143037), (4761, 130599), (4837, 128547), (5589, 111251), (6219, 99981), (11109, 55971), (13041, 47679), (14283, 43533), (14511, 42849), (15893, 39123), (18657, 33327)]