81402880

素因数分解:

$2^{10}\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1223}}^1$

素因数の和:1261

約数の個数: 88

約数和(自身を含む): 210464352

約数和(自身を除く): 129061472

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 640, 832, 1024, 1040, 1223, 1280, 1664, 2080, 2446, 2560, 3328, 4160, 4892, 5120, 6115, 6656, 8320, 9784, 12230, 13312, 15899, 16640, 19568, 24460, 31798, 33280, 39136, 48920, 63596, 66560, 78272, 79495, 97840, 127192, 156544, 158990, 195680, 254384, 313088, 317980, 391360, 508768, 626176, 635960, 782720, 1017536, 1252352, 1271920, 1565440, 2035072, 2543840, 3130880, 4070144, 5087680, 6261760, 8140288, 10175360, 16280576, 20350720, 40701440, 81402880]

約数ペア:

[(1, 81402880), (2, 40701440), (4, 20350720), (5, 16280576), (8, 10175360), (10, 8140288), (13, 6261760), (16, 5087680), (20, 4070144), (26, 3130880), (32, 2543840), (40, 2035072), (52, 1565440), (64, 1271920), (65, 1252352), (80, 1017536), (104, 782720), (128, 635960), (130, 626176), (160, 508768), (208, 391360), (256, 317980), (260, 313088), (320, 254384), (416, 195680), (512, 158990), (520, 156544), (640, 127192), (832, 97840), (1024, 79495), (1040, 78272), (1223, 66560), (1280, 63596), (1664, 48920), (2080, 39136), (2446, 33280), (2560, 31798), (3328, 24460), (4160, 19568), (4892, 16640), (5120, 15899), (6115, 13312), (6656, 12230), (8320, 9784)]