400664240

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^2\times {\mathrm{727}}^1$

素因数の和:906

約数の個数: 60

約数和(自身を含む): 944199984

約数和(自身を除く): 543535744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 727, 830, 1328, 1454, 1660, 2908, 3320, 3635, 5816, 6640, 6889, 7270, 11632, 13778, 14540, 27556, 29080, 34445, 55112, 58160, 60341, 68890, 110224, 120682, 137780, 241364, 275560, 301705, 482728, 551120, 603410, 965456, 1206820, 2413640, 4827280, 5008303, 10016606, 20033212, 25041515, 40066424, 50083030, 80132848, 100166060, 200332120, 400664240]

約数ペア:

[(1, 400664240), (2, 200332120), (4, 100166060), (5, 80132848), (8, 50083030), (10, 40066424), (16, 25041515), (20, 20033212), (40, 10016606), (80, 5008303), (83, 4827280), (166, 2413640), (332, 1206820), (415, 965456), (664, 603410), (727, 551120), (830, 482728), (1328, 301705), (1454, 275560), (1660, 241364), (2908, 137780), (3320, 120682), (3635, 110224), (5816, 68890), (6640, 60341), (6889, 58160), (7270, 55112), (11632, 34445), (13778, 29080), (14540, 27556)]