81597321

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:223

約数の個数: 64

約数和(自身を含む): 137213440

約数和(自身を除く): 55616119

約数列:

[1, 3, 9, 13, 27, 37, 39, 61, 103, 111, 117, 183, 309, 333, 351, 481, 549, 793, 927, 999, 1339, 1443, 1647, 2257, 2379, 2781, 3811, 4017, 4329, 6283, 6771, 7137, 11433, 12051, 12987, 18849, 20313, 21411, 29341, 34299, 36153, 49543, 56547, 60939, 81679, 88023, 102897, 148629, 169641, 232471, 245037, 264069, 445887, 697413, 735111, 792207, 1337661, 2092239, 2205333, 3022123, 6276717, 9066369, 27199107, 81597321]

約数ペア:

[(1, 81597321), (3, 27199107), (9, 9066369), (13, 6276717), (27, 3022123), (37, 2205333), (39, 2092239), (61, 1337661), (103, 792207), (111, 735111), (117, 697413), (183, 445887), (309, 264069), (333, 245037), (351, 232471), (481, 169641), (549, 148629), (793, 102897), (927, 88023), (999, 81679), (1339, 60939), (1443, 56547), (1647, 49543), (2257, 36153), (2379, 34299), (2781, 29341), (3811, 21411), (4017, 20313), (4329, 18849), (6283, 12987), (6771, 12051), (7137, 11433)]