21643440

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{991}}^1$

素因数の和:1027

約数の個数: 160

約数和(自身を含む): 82661376

約数和(自身を除く): 61017936

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 48, 52, 56, 60, 65, 70, 78, 80, 84, 91, 104, 105, 112, 120, 130, 140, 156, 168, 182, 195, 208, 210, 240, 260, 273, 280, 312, 336, 364, 390, 420, 455, 520, 546, 560, 624, 728, 780, 840, 910, 991, 1040, 1092, 1365, 1456, 1560, 1680, 1820, 1982, 2184, 2730, 2973, 3120, 3640, 3964, 4368, 4955, 5460, 5946, 6937, 7280, 7928, 9910, 10920, 11892, 12883, 13874, 14865, 15856, 19820, 20811, 21840, 23784, 25766, 27748, 29730, 34685, 38649, 39640, 41622, 47568, 51532, 55496, 59460, 64415, 69370, 77298, 79280, 83244, 90181, 103064, 104055, 110992, 118920, 128830, 138740, 154596, 166488, 180362, 193245, 206128, 208110, 237840, 257660, 270543, 277480, 309192, 332976, 360724, 386490, 416220, 450905, 515320, 541086, 554960, 618384, 721448, 772980, 832440, 901810, 1030640, 1082172, 1352715, 1442896, 1545960, 1664880, 1803620, 2164344, 2705430, 3091920, 3607240, 4328688, 5410860, 7214480, 10821720, 21643440]

約数ペア:

[(1, 21643440), (2, 10821720), (3, 7214480), (4, 5410860), (5, 4328688), (6, 3607240), (7, 3091920), (8, 2705430), (10, 2164344), (12, 1803620), (13, 1664880), (14, 1545960), (15, 1442896), (16, 1352715), (20, 1082172), (21, 1030640), (24, 901810), (26, 832440), (28, 772980), (30, 721448), (35, 618384), (39, 554960), (40, 541086), (42, 515320), (48, 450905), (52, 416220), (56, 386490), (60, 360724), (65, 332976), (70, 309192), (78, 277480), (80, 270543), (84, 257660), (91, 237840), (104, 208110), (105, 206128), (112, 193245), (120, 180362), (130, 166488), (140, 154596), (156, 138740), (168, 128830), (182, 118920), (195, 110992), (208, 104055), (210, 103064), (240, 90181), (260, 83244), (273, 79280), (280, 77298), (312, 69370), (336, 64415), (364, 59460), (390, 55496), (420, 51532), (455, 47568), (520, 41622), (546, 39640), (560, 38649), (624, 34685), (728, 29730), (780, 27748), (840, 25766), (910, 23784), (991, 21840), (1040, 20811), (1092, 19820), (1365, 15856), (1456, 14865), (1560, 13874), (1680, 12883), (1820, 11892), (1982, 10920), (2184, 9910), (2730, 7928), (2973, 7280), (3120, 6937), (3640, 5946), (3964, 5460), (4368, 4955)]