21082880

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1$

素因数の和:222

約数の個数: 144

約数和(自身を含む): 62497344

約数和(自身を除く): 41414464

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 64, 65, 70, 80, 91, 104, 112, 128, 130, 140, 160, 181, 182, 208, 224, 256, 260, 280, 320, 362, 364, 416, 448, 455, 520, 560, 640, 724, 728, 832, 896, 905, 910, 1040, 1120, 1267, 1280, 1448, 1456, 1664, 1792, 1810, 1820, 2080, 2240, 2353, 2534, 2896, 2912, 3328, 3620, 3640, 4160, 4480, 4706, 5068, 5792, 5824, 6335, 7240, 7280, 8320, 8960, 9412, 10136, 11584, 11648, 11765, 12670, 14480, 14560, 16471, 16640, 18824, 20272, 23168, 23296, 23530, 25340, 28960, 29120, 32942, 37648, 40544, 46336, 47060, 50680, 57920, 58240, 65884, 75296, 81088, 82355, 94120, 101360, 115840, 116480, 131768, 150592, 162176, 164710, 188240, 202720, 231680, 263536, 301184, 324352, 329420, 376480, 405440, 527072, 602368, 658840, 752960, 810880, 1054144, 1317680, 1505920, 1621760, 2108288, 2635360, 3011840, 4216576, 5270720, 10541440, 21082880]

約数ペア:

[(1, 21082880), (2, 10541440), (4, 5270720), (5, 4216576), (7, 3011840), (8, 2635360), (10, 2108288), (13, 1621760), (14, 1505920), (16, 1317680), (20, 1054144), (26, 810880), (28, 752960), (32, 658840), (35, 602368), (40, 527072), (52, 405440), (56, 376480), (64, 329420), (65, 324352), (70, 301184), (80, 263536), (91, 231680), (104, 202720), (112, 188240), (128, 164710), (130, 162176), (140, 150592), (160, 131768), (181, 116480), (182, 115840), (208, 101360), (224, 94120), (256, 82355), (260, 81088), (280, 75296), (320, 65884), (362, 58240), (364, 57920), (416, 50680), (448, 47060), (455, 46336), (520, 40544), (560, 37648), (640, 32942), (724, 29120), (728, 28960), (832, 25340), (896, 23530), (905, 23296), (910, 23168), (1040, 20272), (1120, 18824), (1267, 16640), (1280, 16471), (1448, 14560), (1456, 14480), (1664, 12670), (1792, 11765), (1810, 11648), (1820, 11584), (2080, 10136), (2240, 9412), (2353, 8960), (2534, 8320), (2896, 7280), (2912, 7240), (3328, 6335), (3620, 5824), (3640, 5792), (4160, 5068), (4480, 4706)]