20618640

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4091}}^1$

素因数の和:4117

約数の個数: 120

約数和(自身を含む): 79155648

約数和(自身を除く): 58537008

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4091, 5040, 8182, 12273, 16364, 20455, 24546, 28637, 32728, 36819, 40910, 49092, 57274, 61365, 65456, 73638, 81820, 85911, 98184, 114548, 122730, 143185, 147276, 163640, 171822, 184095, 196368, 229096, 245460, 257733, 286370, 294552, 327280, 343644, 368190, 429555, 458192, 490920, 515466, 572740, 589104, 687288, 736380, 859110, 981840, 1030932, 1145480, 1288665, 1374576, 1472760, 1718220, 2061864, 2290960, 2577330, 2945520, 3436440, 4123728, 5154660, 6872880, 10309320, 20618640]

約数ペア:

[(1, 20618640), (2, 10309320), (3, 6872880), (4, 5154660), (5, 4123728), (6, 3436440), (7, 2945520), (8, 2577330), (9, 2290960), (10, 2061864), (12, 1718220), (14, 1472760), (15, 1374576), (16, 1288665), (18, 1145480), (20, 1030932), (21, 981840), (24, 859110), (28, 736380), (30, 687288), (35, 589104), (36, 572740), (40, 515466), (42, 490920), (45, 458192), (48, 429555), (56, 368190), (60, 343644), (63, 327280), (70, 294552), (72, 286370), (80, 257733), (84, 245460), (90, 229096), (105, 196368), (112, 184095), (120, 171822), (126, 163640), (140, 147276), (144, 143185), (168, 122730), (180, 114548), (210, 98184), (240, 85911), (252, 81820), (280, 73638), (315, 65456), (336, 61365), (360, 57274), (420, 49092), (504, 40910), (560, 36819), (630, 32728), (720, 28637), (840, 24546), (1008, 20455), (1260, 16364), (1680, 12273), (2520, 8182), (4091, 5040)]