21250981120

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{4217}}^1$

素因数の和:4396

約数の個数: 144

約数和(自身を含む): 52971061248

約数和(自身を除く): 31720080128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 127, 128, 155, 160, 248, 254, 256, 310, 320, 496, 508, 620, 635, 640, 992, 1016, 1240, 1270, 1280, 1984, 2032, 2480, 2540, 3937, 3968, 4064, 4217, 4960, 5080, 7874, 7936, 8128, 8434, 9920, 10160, 15748, 16256, 16868, 19685, 19840, 20320, 21085, 31496, 32512, 33736, 39370, 39680, 40640, 42170, 62992, 67472, 78740, 81280, 84340, 125984, 130727, 134944, 157480, 162560, 168680, 251968, 261454, 269888, 314960, 337360, 503936, 522908, 535559, 539776, 629920, 653635, 674720, 1007872, 1045816, 1071118, 1079552, 1259840, 1307270, 1349440, 2091632, 2142236, 2519680, 2614540, 2677795, 2698880, 4183264, 4284472, 5039360, 5229080, 5355590, 5397760, 8366528, 8568944, 10458160, 10711180, 16602329, 16733056, 17137888, 20916320, 21422360, 33204658, 33466112, 34275776, 41832640, 42844720, 66409316, 68551552, 83011645, 83665280, 85689440, 132818632, 137103104, 166023290, 167330560, 171378880, 265637264, 332046580, 342757760, 531274528, 664093160, 685515520, 1062549056, 1328186320, 2125098112, 2656372640, 4250196224, 5312745280, 10625490560, 21250981120]

約数ペア:

[(1, 21250981120), (2, 10625490560), (4, 5312745280), (5, 4250196224), (8, 2656372640), (10, 2125098112), (16, 1328186320), (20, 1062549056), (31, 685515520), (32, 664093160), (40, 531274528), (62, 342757760), (64, 332046580), (80, 265637264), (124, 171378880), (127, 167330560), (128, 166023290), (155, 137103104), (160, 132818632), (248, 85689440), (254, 83665280), (256, 83011645), (310, 68551552), (320, 66409316), (496, 42844720), (508, 41832640), (620, 34275776), (635, 33466112), (640, 33204658), (992, 21422360), (1016, 20916320), (1240, 17137888), (1270, 16733056), (1280, 16602329), (1984, 10711180), (2032, 10458160), (2480, 8568944), (2540, 8366528), (3937, 5397760), (3968, 5355590), (4064, 5229080), (4217, 5039360), (4960, 4284472), (5080, 4183264), (7874, 2698880), (7936, 2677795), (8128, 2614540), (8434, 2519680), (9920, 2142236), (10160, 2091632), (15748, 1349440), (16256, 1307270), (16868, 1259840), (19685, 1079552), (19840, 1071118), (20320, 1045816), (21085, 1007872), (31496, 674720), (32512, 653635), (33736, 629920), (39370, 539776), (39680, 535559), (40640, 522908), (42170, 503936), (62992, 337360), (67472, 314960), (78740, 269888), (81280, 261454), (84340, 251968), (125984, 168680), (130727, 162560), (134944, 157480)]