21118240

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{71}}^1$

素因数の和:123

約数の個数: 144

約数和(自身を含む): 59766336

約数和(自身を除く): 38648096

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 32, 40, 44, 52, 55, 65, 71, 80, 88, 104, 110, 130, 142, 143, 160, 169, 176, 208, 220, 260, 284, 286, 338, 352, 355, 416, 440, 520, 568, 572, 676, 710, 715, 781, 845, 880, 923, 1040, 1136, 1144, 1352, 1420, 1430, 1562, 1690, 1760, 1846, 1859, 2080, 2272, 2288, 2704, 2840, 2860, 3124, 3380, 3692, 3718, 3905, 4576, 4615, 5408, 5680, 5720, 6248, 6760, 7384, 7436, 7810, 9230, 9295, 10153, 11360, 11440, 11999, 12496, 13520, 14768, 14872, 15620, 18460, 18590, 20306, 22880, 23998, 24992, 27040, 29536, 29744, 31240, 36920, 37180, 40612, 47996, 50765, 59488, 59995, 62480, 73840, 74360, 81224, 95992, 101530, 119990, 124960, 131989, 147680, 148720, 162448, 191984, 203060, 239980, 263978, 297440, 324896, 383968, 406120, 479960, 527956, 659945, 812240, 959920, 1055912, 1319890, 1624480, 1919840, 2111824, 2639780, 4223648, 5279560, 10559120, 21118240]

約数ペア:

[(1, 21118240), (2, 10559120), (4, 5279560), (5, 4223648), (8, 2639780), (10, 2111824), (11, 1919840), (13, 1624480), (16, 1319890), (20, 1055912), (22, 959920), (26, 812240), (32, 659945), (40, 527956), (44, 479960), (52, 406120), (55, 383968), (65, 324896), (71, 297440), (80, 263978), (88, 239980), (104, 203060), (110, 191984), (130, 162448), (142, 148720), (143, 147680), (160, 131989), (169, 124960), (176, 119990), (208, 101530), (220, 95992), (260, 81224), (284, 74360), (286, 73840), (338, 62480), (352, 59995), (355, 59488), (416, 50765), (440, 47996), (520, 40612), (568, 37180), (572, 36920), (676, 31240), (710, 29744), (715, 29536), (781, 27040), (845, 24992), (880, 23998), (923, 22880), (1040, 20306), (1136, 18590), (1144, 18460), (1352, 15620), (1420, 14872), (1430, 14768), (1562, 13520), (1690, 12496), (1760, 11999), (1846, 11440), (1859, 11360), (2080, 10153), (2272, 9295), (2288, 9230), (2704, 7810), (2840, 7436), (2860, 7384), (3124, 6760), (3380, 6248), (3692, 5720), (3718, 5680), (3905, 5408), (4576, 4615)]