28757547

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:149

約数の個数: 72

約数和(自身を含む): 53517984

約数和(自身を除く): 24760437

約数列:

[1, 3, 7, 9, 13, 21, 37, 39, 63, 73, 91, 111, 117, 169, 219, 259, 273, 333, 481, 507, 511, 657, 777, 819, 949, 1183, 1443, 1521, 1533, 2331, 2701, 2847, 3367, 3549, 4329, 4599, 6253, 6643, 8103, 8541, 10101, 10647, 12337, 18759, 18907, 19929, 24309, 30303, 35113, 37011, 43771, 56277, 56721, 59787, 86359, 105339, 111033, 131313, 170163, 245791, 259077, 316017, 393939, 456469, 737373, 777231, 1369407, 2212119, 3195283, 4108221, 9585849, 28757547]

約数ペア:

[(1, 28757547), (3, 9585849), (7, 4108221), (9, 3195283), (13, 2212119), (21, 1369407), (37, 777231), (39, 737373), (63, 456469), (73, 393939), (91, 316017), (111, 259077), (117, 245791), (169, 170163), (219, 131313), (259, 111033), (273, 105339), (333, 86359), (481, 59787), (507, 56721), (511, 56277), (657, 43771), (777, 37011), (819, 35113), (949, 30303), (1183, 24309), (1443, 19929), (1521, 18907), (1533, 18759), (2331, 12337), (2701, 10647), (2847, 10101), (3367, 8541), (3549, 8103), (4329, 6643), (4599, 6253)]