80465140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{19819}}^1$

素因数の和:19864

約数の個数: 48

約数和(自身を含む): 199785600

約数和(自身を除く): 119320460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 19819, 39638, 79276, 99095, 138733, 198190, 277466, 396380, 554932, 574751, 693665, 1149502, 1387330, 2299004, 2774660, 2873755, 4023257, 5747510, 8046514, 11495020, 16093028, 20116285, 40232570, 80465140]

約数ペア:

[(1, 80465140), (2, 40232570), (4, 20116285), (5, 16093028), (7, 11495020), (10, 8046514), (14, 5747510), (20, 4023257), (28, 2873755), (29, 2774660), (35, 2299004), (58, 1387330), (70, 1149502), (116, 693665), (140, 574751), (145, 554932), (203, 396380), (290, 277466), (406, 198190), (580, 138733), (812, 99095), (1015, 79276), (2030, 39638), (4060, 19819)]