18949815

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{359}}^1$

素因数の和:413

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 18374985

約数列:

[1, 3, 5, 9, 15, 17, 23, 27, 45, 51, 69, 85, 115, 135, 153, 207, 255, 345, 359, 391, 459, 621, 765, 1035, 1077, 1173, 1795, 1955, 2295, 3105, 3231, 3519, 5385, 5865, 6103, 8257, 9693, 10557, 16155, 17595, 18309, 24771, 30515, 41285, 48465, 52785, 54927, 74313, 91545, 123855, 140369, 164781, 222939, 274635, 371565, 421107, 701845, 823905, 1114695, 1263321, 2105535, 3789963, 6316605, 18949815]

約数ペア:

[(1, 18949815), (3, 6316605), (5, 3789963), (9, 2105535), (15, 1263321), (17, 1114695), (23, 823905), (27, 701845), (45, 421107), (51, 371565), (69, 274635), (85, 222939), (115, 164781), (135, 140369), (153, 123855), (207, 91545), (255, 74313), (345, 54927), (359, 52785), (391, 48465), (459, 41285), (621, 30515), (765, 24771), (1035, 18309), (1077, 17595), (1173, 16155), (1795, 10557), (1955, 9693), (2295, 8257), (3105, 6103), (3231, 5865), (3519, 5385)]