81963520

素因数分解:

$2^9\times 5^1\times {\mathrm{101}}^1\times {\mathrm{317}}^1$

素因数の和:441

約数の個数: 80

約数和(自身を含む): 199092168

約数和(自身を除く): 117128648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 128, 160, 202, 256, 317, 320, 404, 505, 512, 634, 640, 808, 1010, 1268, 1280, 1585, 1616, 2020, 2536, 2560, 3170, 3232, 4040, 5072, 6340, 6464, 8080, 10144, 12680, 12928, 16160, 20288, 25360, 25856, 32017, 32320, 40576, 50720, 51712, 64034, 64640, 81152, 101440, 128068, 129280, 160085, 162304, 202880, 256136, 258560, 320170, 405760, 512272, 640340, 811520, 1024544, 1280680, 2049088, 2561360, 4098176, 5122720, 8196352, 10245440, 16392704, 20490880, 40981760, 81963520]

約数ペア:

[(1, 81963520), (2, 40981760), (4, 20490880), (5, 16392704), (8, 10245440), (10, 8196352), (16, 5122720), (20, 4098176), (32, 2561360), (40, 2049088), (64, 1280680), (80, 1024544), (101, 811520), (128, 640340), (160, 512272), (202, 405760), (256, 320170), (317, 258560), (320, 256136), (404, 202880), (505, 162304), (512, 160085), (634, 129280), (640, 128068), (808, 101440), (1010, 81152), (1268, 64640), (1280, 64034), (1585, 51712), (1616, 50720), (2020, 40576), (2536, 32320), (2560, 32017), (3170, 25856), (3232, 25360), (4040, 20288), (5072, 16160), (6340, 12928), (6464, 12680), (8080, 10144)]