20456077840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1429}}^1\times {\mathrm{16267}}^1$

素因数の和:17720

約数の個数: 80

約数和(自身を含む): 51923551680

約数和(自身を除く): 31467473840

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 1429, 2858, 5716, 7145, 11432, 14290, 15719, 16267, 22864, 28580, 31438, 32534, 57160, 62876, 65068, 78595, 81335, 114320, 125752, 130136, 157190, 162670, 178937, 251504, 260272, 314380, 325340, 357874, 628760, 650680, 715748, 894685, 1257520, 1301360, 1431496, 1789370, 2862992, 3578740, 7157480, 14314960, 23245543, 46491086, 92982172, 116227715, 185964344, 232455430, 255700973, 371928688, 464910860, 511401946, 929821720, 1022803892, 1278504865, 1859643440, 2045607784, 2557009730, 4091215568, 5114019460, 10228038920, 20456077840]

約数ペア:

[(1, 20456077840), (2, 10228038920), (4, 5114019460), (5, 4091215568), (8, 2557009730), (10, 2045607784), (11, 1859643440), (16, 1278504865), (20, 1022803892), (22, 929821720), (40, 511401946), (44, 464910860), (55, 371928688), (80, 255700973), (88, 232455430), (110, 185964344), (176, 116227715), (220, 92982172), (440, 46491086), (880, 23245543), (1429, 14314960), (2858, 7157480), (5716, 3578740), (7145, 2862992), (11432, 1789370), (14290, 1431496), (15719, 1301360), (16267, 1257520), (22864, 894685), (28580, 715748), (31438, 650680), (32534, 628760), (57160, 357874), (62876, 325340), (65068, 314380), (78595, 260272), (81335, 251504), (114320, 178937), (125752, 162670), (130136, 157190)]