399511520

素因数分解:

$2^5\times 5^1\times {\mathrm{127}}^1\times {\mathrm{19661}}^1$

素因数の和:19803

約数の個数: 48

約数和(自身を含む): 951326208

約数和(自身を除く): 551814688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 127, 160, 254, 508, 635, 1016, 1270, 2032, 2540, 4064, 5080, 10160, 19661, 20320, 39322, 78644, 98305, 157288, 196610, 314576, 393220, 629152, 786440, 1572880, 2496947, 3145760, 4993894, 9987788, 12484735, 19975576, 24969470, 39951152, 49938940, 79902304, 99877880, 199755760, 399511520]

約数ペア:

[(1, 399511520), (2, 199755760), (4, 99877880), (5, 79902304), (8, 49938940), (10, 39951152), (16, 24969470), (20, 19975576), (32, 12484735), (40, 9987788), (80, 4993894), (127, 3145760), (160, 2496947), (254, 1572880), (508, 786440), (635, 629152), (1016, 393220), (1270, 314576), (2032, 196610), (2540, 157288), (4064, 98305), (5080, 78644), (10160, 39322), (19661, 20320)]