20131248760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{364961}}^1$

素因数の和:365176

約数の個数: 64

約数和(自身を含む): 52028982720

約数和(自身を除く): 31897733960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 197, 280, 394, 788, 985, 1379, 1576, 1970, 2758, 3940, 5516, 6895, 7880, 11032, 13790, 27580, 55160, 364961, 729922, 1459844, 1824805, 2554727, 2919688, 3649610, 5109454, 7299220, 10218908, 12773635, 14598440, 20437816, 25547270, 51094540, 71897317, 102189080, 143794634, 287589268, 359486585, 503281219, 575178536, 718973170, 1006562438, 1437946340, 2013124876, 2516406095, 2875892680, 4026249752, 5032812190, 10065624380, 20131248760]

約数ペア:

[(1, 20131248760), (2, 10065624380), (4, 5032812190), (5, 4026249752), (7, 2875892680), (8, 2516406095), (10, 2013124876), (14, 1437946340), (20, 1006562438), (28, 718973170), (35, 575178536), (40, 503281219), (56, 359486585), (70, 287589268), (140, 143794634), (197, 102189080), (280, 71897317), (394, 51094540), (788, 25547270), (985, 20437816), (1379, 14598440), (1576, 12773635), (1970, 10218908), (2758, 7299220), (3940, 5109454), (5516, 3649610), (6895, 2919688), (7880, 2554727), (11032, 1824805), (13790, 1459844), (27580, 729922), (55160, 364961)]