20451700480

素因数分解:

$2^8\times 5^1\times {\mathrm{193}}^1\times {\mathrm{82787}}^1$

素因数の和:83001

約数の個数: 72

約数和(自身を含む): 49242633552

約数和(自身を除く): 28790933072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 193, 256, 320, 386, 640, 772, 965, 1280, 1544, 1930, 3088, 3860, 6176, 7720, 12352, 15440, 24704, 30880, 49408, 61760, 82787, 123520, 165574, 247040, 331148, 413935, 662296, 827870, 1324592, 1655740, 2649184, 3311480, 5298368, 6622960, 10596736, 13245920, 15977891, 21193472, 26491840, 31955782, 52983680, 63911564, 79889455, 105967360, 127823128, 159778910, 255646256, 319557820, 511292512, 639115640, 1022585024, 1278231280, 2045170048, 2556462560, 4090340096, 5112925120, 10225850240, 20451700480]

約数ペア:

[(1, 20451700480), (2, 10225850240), (4, 5112925120), (5, 4090340096), (8, 2556462560), (10, 2045170048), (16, 1278231280), (20, 1022585024), (32, 639115640), (40, 511292512), (64, 319557820), (80, 255646256), (128, 159778910), (160, 127823128), (193, 105967360), (256, 79889455), (320, 63911564), (386, 52983680), (640, 31955782), (772, 26491840), (965, 21193472), (1280, 15977891), (1544, 13245920), (1930, 10596736), (3088, 6622960), (3860, 5298368), (6176, 3311480), (7720, 2649184), (12352, 1655740), (15440, 1324592), (24704, 827870), (30880, 662296), (49408, 413935), (61760, 331148), (82787, 247040), (123520, 165574)]