20640240

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{263}}^1$

素因数の和:391

約数の個数: 120

約数和(自身を含む): 70218720

約数和(自身を除く): 49578480

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 109, 120, 144, 180, 218, 240, 263, 327, 360, 436, 526, 545, 654, 720, 789, 872, 981, 1052, 1090, 1308, 1315, 1578, 1635, 1744, 1962, 2104, 2180, 2367, 2616, 2630, 3156, 3270, 3924, 3945, 4208, 4360, 4734, 4905, 5232, 5260, 6312, 6540, 7848, 7890, 8720, 9468, 9810, 10520, 11835, 12624, 13080, 15696, 15780, 18936, 19620, 21040, 23670, 26160, 28667, 31560, 37872, 39240, 47340, 57334, 63120, 78480, 86001, 94680, 114668, 143335, 172002, 189360, 229336, 258003, 286670, 344004, 430005, 458672, 516006, 573340, 688008, 860010, 1032012, 1146680, 1290015, 1376016, 1720020, 2064024, 2293360, 2580030, 3440040, 4128048, 5160060, 6880080, 10320120, 20640240]

約数ペア:

[(1, 20640240), (2, 10320120), (3, 6880080), (4, 5160060), (5, 4128048), (6, 3440040), (8, 2580030), (9, 2293360), (10, 2064024), (12, 1720020), (15, 1376016), (16, 1290015), (18, 1146680), (20, 1032012), (24, 860010), (30, 688008), (36, 573340), (40, 516006), (45, 458672), (48, 430005), (60, 344004), (72, 286670), (80, 258003), (90, 229336), (109, 189360), (120, 172002), (144, 143335), (180, 114668), (218, 94680), (240, 86001), (263, 78480), (327, 63120), (360, 57334), (436, 47340), (526, 39240), (545, 37872), (654, 31560), (720, 28667), (789, 26160), (872, 23670), (981, 21040), (1052, 19620), (1090, 18936), (1308, 15780), (1315, 15696), (1578, 13080), (1635, 12624), (1744, 11835), (1962, 10520), (2104, 9810), (2180, 9468), (2367, 8720), (2616, 7890), (2630, 7848), (3156, 6540), (3270, 6312), (3924, 5260), (3945, 5232), (4208, 4905), (4360, 4734)]