20781110

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^2\times {\mathrm{353}}^1$

素因数の和:425

約数の個数: 48

約数和(自身を含む): 44400096

約数和(自身を除く): 23618986

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 145, 203, 290, 353, 406, 706, 841, 1015, 1682, 1765, 2030, 2471, 3530, 4205, 4942, 5887, 8410, 10237, 11774, 12355, 20474, 24710, 29435, 51185, 58870, 71659, 102370, 143318, 296873, 358295, 593746, 716590, 1484365, 2078111, 2968730, 4156222, 10390555, 20781110]

約数ペア:

[(1, 20781110), (2, 10390555), (5, 4156222), (7, 2968730), (10, 2078111), (14, 1484365), (29, 716590), (35, 593746), (58, 358295), (70, 296873), (145, 143318), (203, 102370), (290, 71659), (353, 58870), (406, 51185), (706, 29435), (841, 24710), (1015, 20474), (1682, 12355), (1765, 11774), (2030, 10237), (2471, 8410), (3530, 5887), (4205, 4942)]