21781851

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{3469}}^1$

素因数の和:3515

約数の個数: 32

約数和(自身を含む): 37309440

約数和(自身を除く): 15527589

約数列:

[1, 3, 7, 13, 21, 23, 39, 69, 91, 161, 273, 299, 483, 897, 2093, 3469, 6279, 10407, 24283, 45097, 72849, 79787, 135291, 239361, 315679, 558509, 947037, 1037231, 1675527, 3111693, 7260617, 21781851]

約数ペア:

[(1, 21781851), (3, 7260617), (7, 3111693), (13, 1675527), (21, 1037231), (23, 947037), (39, 558509), (69, 315679), (91, 239361), (161, 135291), (273, 79787), (299, 72849), (483, 45097), (897, 24283), (2093, 10407), (3469, 6279)]