20520800

素因数分解:

$2^5\times 5^2\times {\mathrm{113}}^1\times {\mathrm{227}}^1$

素因数の和:360

約数の個数: 72

約数和(自身を含む): 50762376

約数和(自身を除く): 30241576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 113, 160, 200, 226, 227, 400, 452, 454, 565, 800, 904, 908, 1130, 1135, 1808, 1816, 2260, 2270, 2825, 3616, 3632, 4520, 4540, 5650, 5675, 7264, 9040, 9080, 11300, 11350, 18080, 18160, 22600, 22700, 25651, 36320, 45200, 45400, 51302, 90400, 90800, 102604, 128255, 181600, 205208, 256510, 410416, 513020, 641275, 820832, 1026040, 1282550, 2052080, 2565100, 4104160, 5130200, 10260400, 20520800]

約数ペア:

[(1, 20520800), (2, 10260400), (4, 5130200), (5, 4104160), (8, 2565100), (10, 2052080), (16, 1282550), (20, 1026040), (25, 820832), (32, 641275), (40, 513020), (50, 410416), (80, 256510), (100, 205208), (113, 181600), (160, 128255), (200, 102604), (226, 90800), (227, 90400), (400, 51302), (452, 45400), (454, 45200), (565, 36320), (800, 25651), (904, 22700), (908, 22600), (1130, 18160), (1135, 18080), (1808, 11350), (1816, 11300), (2260, 9080), (2270, 9040), (2825, 7264), (3616, 5675), (3632, 5650), (4520, 4540)]