21810915

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{4073}}^1$

素因数の和:4108

約数の個数: 48

約数和(自身を含む): 45759168

約数和(自身を除く): 23948253

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 4073, 5355, 12219, 20365, 28511, 36657, 61095, 69241, 85533, 142555, 183285, 207723, 256599, 346205, 427665, 484687, 623169, 1038615, 1282995, 1454061, 2423435, 3115845, 4362183, 7270305, 21810915]

約数ペア:

[(1, 21810915), (3, 7270305), (5, 4362183), (7, 3115845), (9, 2423435), (15, 1454061), (17, 1282995), (21, 1038615), (35, 623169), (45, 484687), (51, 427665), (63, 346205), (85, 256599), (105, 207723), (119, 183285), (153, 142555), (255, 85533), (315, 69241), (357, 61095), (595, 36657), (765, 28511), (1071, 20365), (1785, 12219), (4073, 5355)]