820781520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263071}}^1$

素因数の和:263100

約数の個数: 80

約数和(自身を含む): 2740157952

約数和(自身を除く): 1919376432

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 263071, 526142, 789213, 1052284, 1315355, 1578426, 2104568, 2630710, 3156852, 3419923, 3946065, 4209136, 5261420, 6313704, 6839846, 7892130, 10259769, 10522840, 12627408, 13679692, 15784260, 17099615, 20519538, 21045680, 27359384, 31568520, 34199230, 41039076, 51298845, 54718768, 63137040, 68398460, 82078152, 102597690, 136796920, 164156304, 205195380, 273593840, 410390760, 820781520]

約数ペア:

[(1, 820781520), (2, 410390760), (3, 273593840), (4, 205195380), (5, 164156304), (6, 136796920), (8, 102597690), (10, 82078152), (12, 68398460), (13, 63137040), (15, 54718768), (16, 51298845), (20, 41039076), (24, 34199230), (26, 31568520), (30, 27359384), (39, 21045680), (40, 20519538), (48, 17099615), (52, 15784260), (60, 13679692), (65, 12627408), (78, 10522840), (80, 10259769), (104, 7892130), (120, 6839846), (130, 6313704), (156, 5261420), (195, 4209136), (208, 3946065), (240, 3419923), (260, 3156852), (312, 2630710), (390, 2104568), (520, 1578426), (624, 1315355), (780, 1052284), (1040, 789213), (1560, 526142), (3120, 263071)]