81490240

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1031}}^1$

素因数の和:1080

約数の個数: 112

約数和(自身を含む): 220187520

約数和(自身を除く): 138697280

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 320, 380, 416, 494, 520, 608, 760, 832, 988, 1031, 1040, 1216, 1235, 1520, 1976, 2062, 2080, 2470, 3040, 3952, 4124, 4160, 4940, 5155, 6080, 7904, 8248, 9880, 10310, 13403, 15808, 16496, 19589, 19760, 20620, 26806, 32992, 39178, 39520, 41240, 53612, 65984, 67015, 78356, 79040, 82480, 97945, 107224, 134030, 156712, 164960, 195890, 214448, 254657, 268060, 313424, 329920, 391780, 428896, 509314, 536120, 626848, 783560, 857792, 1018628, 1072240, 1253696, 1273285, 1567120, 2037256, 2144480, 2546570, 3134240, 4074512, 4288960, 5093140, 6268480, 8149024, 10186280, 16298048, 20372560, 40745120, 81490240]

約数ペア:

[(1, 81490240), (2, 40745120), (4, 20372560), (5, 16298048), (8, 10186280), (10, 8149024), (13, 6268480), (16, 5093140), (19, 4288960), (20, 4074512), (26, 3134240), (32, 2546570), (38, 2144480), (40, 2037256), (52, 1567120), (64, 1273285), (65, 1253696), (76, 1072240), (80, 1018628), (95, 857792), (104, 783560), (130, 626848), (152, 536120), (160, 509314), (190, 428896), (208, 391780), (247, 329920), (260, 313424), (304, 268060), (320, 254657), (380, 214448), (416, 195890), (494, 164960), (520, 156712), (608, 134030), (760, 107224), (832, 97945), (988, 82480), (1031, 79040), (1040, 78356), (1216, 67015), (1235, 65984), (1520, 53612), (1976, 41240), (2062, 39520), (2080, 39178), (2470, 32992), (3040, 26806), (3952, 20620), (4124, 19760), (4160, 19589), (4940, 16496), (5155, 15808), (6080, 13403), (7904, 10310), (8248, 9880)]