81874520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{271}}^1$

素因数の和:385

約数の個数: 128

約数和(自身を含む): 230307840

約数和(自身を除く): 148433320

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 83, 91, 104, 130, 140, 166, 182, 260, 271, 280, 332, 364, 415, 455, 520, 542, 581, 664, 728, 830, 910, 1079, 1084, 1162, 1355, 1660, 1820, 1897, 2158, 2168, 2324, 2710, 2905, 3320, 3523, 3640, 3794, 4316, 4648, 5395, 5420, 5810, 7046, 7553, 7588, 8632, 9485, 10790, 10840, 11620, 14092, 15106, 15176, 17615, 18970, 21580, 22493, 23240, 24661, 28184, 30212, 35230, 37765, 37940, 43160, 44986, 49322, 60424, 70460, 75530, 75880, 89972, 98644, 112465, 123305, 140920, 151060, 157451, 179944, 197288, 224930, 246610, 292409, 302120, 314902, 449860, 493220, 584818, 629804, 787255, 899720, 986440, 1169636, 1259608, 1462045, 1574510, 2046863, 2339272, 2924090, 3149020, 4093726, 5848180, 6298040, 8187452, 10234315, 11696360, 16374904, 20468630, 40937260, 81874520]

約数ペア:

[(1, 81874520), (2, 40937260), (4, 20468630), (5, 16374904), (7, 11696360), (8, 10234315), (10, 8187452), (13, 6298040), (14, 5848180), (20, 4093726), (26, 3149020), (28, 2924090), (35, 2339272), (40, 2046863), (52, 1574510), (56, 1462045), (65, 1259608), (70, 1169636), (83, 986440), (91, 899720), (104, 787255), (130, 629804), (140, 584818), (166, 493220), (182, 449860), (260, 314902), (271, 302120), (280, 292409), (332, 246610), (364, 224930), (415, 197288), (455, 179944), (520, 157451), (542, 151060), (581, 140920), (664, 123305), (728, 112465), (830, 98644), (910, 89972), (1079, 75880), (1084, 75530), (1162, 70460), (1355, 60424), (1660, 49322), (1820, 44986), (1897, 43160), (2158, 37940), (2168, 37765), (2324, 35230), (2710, 30212), (2905, 28184), (3320, 24661), (3523, 23240), (3640, 22493), (3794, 21580), (4316, 18970), (4648, 17615), (5395, 15176), (5420, 15106), (5810, 14092), (7046, 11620), (7553, 10840), (7588, 10790), (8632, 9485)]