20871036160

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1254269}}^1$

素因数の和:1254303

約数の個数: 72

約数和(自身を含む): 53838285480

約数和(自身を除く): 32967249320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1280, 1664, 2080, 3328, 4160, 8320, 16640, 1254269, 2508538, 5017076, 6271345, 10034152, 12542690, 16305497, 20068304, 25085380, 32610994, 40136608, 50170760, 65221988, 80273216, 81527485, 100341520, 130443976, 160546432, 163054970, 200683040, 260887952, 321092864, 326109940, 401366080, 521775904, 652219880, 802732160, 1043551808, 1304439760, 1605464320, 2087103616, 2608879520, 4174207232, 5217759040, 10435518080, 20871036160]

約数ペア:

[(1, 20871036160), (2, 10435518080), (4, 5217759040), (5, 4174207232), (8, 2608879520), (10, 2087103616), (13, 1605464320), (16, 1304439760), (20, 1043551808), (26, 802732160), (32, 652219880), (40, 521775904), (52, 401366080), (64, 326109940), (65, 321092864), (80, 260887952), (104, 200683040), (128, 163054970), (130, 160546432), (160, 130443976), (208, 100341520), (256, 81527485), (260, 80273216), (320, 65221988), (416, 50170760), (520, 40136608), (640, 32610994), (832, 25085380), (1040, 20068304), (1280, 16305497), (1664, 12542690), (2080, 10034152), (3328, 6271345), (4160, 5017076), (8320, 2508538), (16640, 1254269)]