21281520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{359}}^1$

素因数の和:407

約数の個数: 160

約数和(自身を含む): 74995200

約数和(自身を除く): 53713680

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 19, 20, 24, 26, 30, 38, 39, 40, 48, 52, 57, 60, 65, 76, 78, 80, 95, 104, 114, 120, 130, 152, 156, 190, 195, 208, 228, 240, 247, 260, 285, 304, 312, 359, 380, 390, 456, 494, 520, 570, 624, 718, 741, 760, 780, 912, 988, 1040, 1077, 1140, 1235, 1436, 1482, 1520, 1560, 1795, 1976, 2154, 2280, 2470, 2872, 2964, 3120, 3590, 3705, 3952, 4308, 4560, 4667, 4940, 5385, 5744, 5928, 6821, 7180, 7410, 8616, 9334, 9880, 10770, 11856, 13642, 14001, 14360, 14820, 17232, 18668, 19760, 20463, 21540, 23335, 27284, 28002, 28720, 29640, 34105, 37336, 40926, 43080, 46670, 54568, 56004, 59280, 68210, 70005, 74672, 81852, 86160, 88673, 93340, 102315, 109136, 112008, 136420, 140010, 163704, 177346, 186680, 204630, 224016, 266019, 272840, 280020, 327408, 354692, 373360, 409260, 443365, 532038, 545680, 560040, 709384, 818520, 886730, 1064076, 1120080, 1330095, 1418768, 1637040, 1773460, 2128152, 2660190, 3546920, 4256304, 5320380, 7093840, 10640760, 21281520]

約数ペア:

[(1, 21281520), (2, 10640760), (3, 7093840), (4, 5320380), (5, 4256304), (6, 3546920), (8, 2660190), (10, 2128152), (12, 1773460), (13, 1637040), (15, 1418768), (16, 1330095), (19, 1120080), (20, 1064076), (24, 886730), (26, 818520), (30, 709384), (38, 560040), (39, 545680), (40, 532038), (48, 443365), (52, 409260), (57, 373360), (60, 354692), (65, 327408), (76, 280020), (78, 272840), (80, 266019), (95, 224016), (104, 204630), (114, 186680), (120, 177346), (130, 163704), (152, 140010), (156, 136420), (190, 112008), (195, 109136), (208, 102315), (228, 93340), (240, 88673), (247, 86160), (260, 81852), (285, 74672), (304, 70005), (312, 68210), (359, 59280), (380, 56004), (390, 54568), (456, 46670), (494, 43080), (520, 40926), (570, 37336), (624, 34105), (718, 29640), (741, 28720), (760, 28002), (780, 27284), (912, 23335), (988, 21540), (1040, 20463), (1077, 19760), (1140, 18668), (1235, 17232), (1436, 14820), (1482, 14360), (1520, 14001), (1560, 13642), (1795, 11856), (1976, 10770), (2154, 9880), (2280, 9334), (2470, 8616), (2872, 7410), (2964, 7180), (3120, 6821), (3590, 5928), (3705, 5744), (3952, 5385), (4308, 4940), (4560, 4667)]