81240880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{607}}^1$

素因数の和:866

約数の個数: 80

約数和(自身を含む): 217128960

約数和(自身を除く): 135888080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 239, 280, 478, 560, 607, 956, 1195, 1214, 1673, 1912, 2390, 2428, 3035, 3346, 3824, 4249, 4780, 4856, 6070, 6692, 8365, 8498, 9560, 9712, 12140, 13384, 16730, 16996, 19120, 21245, 24280, 26768, 33460, 33992, 42490, 48560, 66920, 67984, 84980, 133840, 145073, 169960, 290146, 339920, 580292, 725365, 1015511, 1160584, 1450730, 2031022, 2321168, 2901460, 4062044, 5077555, 5802920, 8124088, 10155110, 11605840, 16248176, 20310220, 40620440, 81240880]

約数ペア:

[(1, 81240880), (2, 40620440), (4, 20310220), (5, 16248176), (7, 11605840), (8, 10155110), (10, 8124088), (14, 5802920), (16, 5077555), (20, 4062044), (28, 2901460), (35, 2321168), (40, 2031022), (56, 1450730), (70, 1160584), (80, 1015511), (112, 725365), (140, 580292), (239, 339920), (280, 290146), (478, 169960), (560, 145073), (607, 133840), (956, 84980), (1195, 67984), (1214, 66920), (1673, 48560), (1912, 42490), (2390, 33992), (2428, 33460), (3035, 26768), (3346, 24280), (3824, 21245), (4249, 19120), (4780, 16996), (4856, 16730), (6070, 13384), (6692, 12140), (8365, 9712), (8498, 9560)]