20079920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1559}}^1$

素因数の和:1602

約数の個数: 80

約数和(自身を含む): 55710720

約数和(自身を除く): 35630800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1559, 1610, 1840, 2576, 3118, 3220, 6236, 6440, 7795, 10913, 12472, 12880, 15590, 21826, 24944, 31180, 35857, 43652, 54565, 62360, 71714, 87304, 109130, 124720, 143428, 174608, 179285, 218260, 250999, 286856, 358570, 436520, 501998, 573712, 717140, 873040, 1003996, 1254995, 1434280, 2007992, 2509990, 2868560, 4015984, 5019980, 10039960, 20079920]

約数ペア:

[(1, 20079920), (2, 10039960), (4, 5019980), (5, 4015984), (7, 2868560), (8, 2509990), (10, 2007992), (14, 1434280), (16, 1254995), (20, 1003996), (23, 873040), (28, 717140), (35, 573712), (40, 501998), (46, 436520), (56, 358570), (70, 286856), (80, 250999), (92, 218260), (112, 179285), (115, 174608), (140, 143428), (161, 124720), (184, 109130), (230, 87304), (280, 71714), (322, 62360), (368, 54565), (460, 43652), (560, 35857), (644, 31180), (805, 24944), (920, 21826), (1288, 15590), (1559, 12880), (1610, 12472), (1840, 10913), (2576, 7795), (3118, 6440), (3220, 6236)]