21450520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:185

約数の個数: 128

約数和(自身を含む): 60963840

約数和(自身を除く): 39513320

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 71, 83, 91, 104, 130, 140, 142, 166, 182, 260, 280, 284, 332, 355, 364, 415, 455, 497, 520, 568, 581, 664, 710, 728, 830, 910, 923, 994, 1079, 1162, 1420, 1660, 1820, 1846, 1988, 2158, 2324, 2485, 2840, 2905, 3320, 3640, 3692, 3976, 4316, 4615, 4648, 4970, 5395, 5810, 5893, 6461, 7384, 7553, 8632, 9230, 9940, 10790, 11620, 11786, 12922, 15106, 18460, 19880, 21580, 23240, 23572, 25844, 29465, 30212, 32305, 36920, 37765, 41251, 43160, 47144, 51688, 58930, 60424, 64610, 75530, 76609, 82502, 117860, 129220, 151060, 153218, 165004, 206255, 235720, 258440, 302120, 306436, 330008, 383045, 412510, 536263, 612872, 766090, 825020, 1072526, 1532180, 1650040, 2145052, 2681315, 3064360, 4290104, 5362630, 10725260, 21450520]

約数ペア:

[(1, 21450520), (2, 10725260), (4, 5362630), (5, 4290104), (7, 3064360), (8, 2681315), (10, 2145052), (13, 1650040), (14, 1532180), (20, 1072526), (26, 825020), (28, 766090), (35, 612872), (40, 536263), (52, 412510), (56, 383045), (65, 330008), (70, 306436), (71, 302120), (83, 258440), (91, 235720), (104, 206255), (130, 165004), (140, 153218), (142, 151060), (166, 129220), (182, 117860), (260, 82502), (280, 76609), (284, 75530), (332, 64610), (355, 60424), (364, 58930), (415, 51688), (455, 47144), (497, 43160), (520, 41251), (568, 37765), (581, 36920), (664, 32305), (710, 30212), (728, 29465), (830, 25844), (910, 23572), (923, 23240), (994, 21580), (1079, 19880), (1162, 18460), (1420, 15106), (1660, 12922), (1820, 11786), (1846, 11620), (1988, 10790), (2158, 9940), (2324, 9230), (2485, 8632), (2840, 7553), (2905, 7384), (3320, 6461), (3640, 5893), (3692, 5810), (3976, 5395), (4316, 4970), (4615, 4648)]