18929920

素因数分解:

$2^8\times 5^1\times {\mathrm{23}}^1\times {\mathrm{643}}^1$

素因数の和:687

約数の個数: 72

約数和(自身を含む): 47388096

約数和(自身を除く): 28458176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 368, 460, 640, 643, 736, 920, 1280, 1286, 1472, 1840, 2572, 2944, 3215, 3680, 5144, 5888, 6430, 7360, 10288, 12860, 14720, 14789, 20576, 25720, 29440, 29578, 41152, 51440, 59156, 73945, 82304, 102880, 118312, 147890, 164608, 205760, 236624, 295780, 411520, 473248, 591560, 823040, 946496, 1183120, 1892992, 2366240, 3785984, 4732480, 9464960, 18929920]

約数ペア:

[(1, 18929920), (2, 9464960), (4, 4732480), (5, 3785984), (8, 2366240), (10, 1892992), (16, 1183120), (20, 946496), (23, 823040), (32, 591560), (40, 473248), (46, 411520), (64, 295780), (80, 236624), (92, 205760), (115, 164608), (128, 147890), (160, 118312), (184, 102880), (230, 82304), (256, 73945), (320, 59156), (368, 51440), (460, 41152), (640, 29578), (643, 29440), (736, 25720), (920, 20576), (1280, 14789), (1286, 14720), (1472, 12860), (1840, 10288), (2572, 7360), (2944, 6430), (3215, 5888), (3680, 5144)]