21047265

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12641}}^1$

素因数の和:12689

約数の個数: 24

約数和(自身を含む): 37470888

約数和(自身を除く): 16423623

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12641, 37923, 63205, 113769, 189615, 467717, 568845, 1403151, 2338585, 4209453, 7015755, 21047265]

約数ペア:

[(1, 21047265), (3, 7015755), (5, 4209453), (9, 2338585), (15, 1403151), (37, 568845), (45, 467717), (111, 189615), (185, 113769), (333, 63205), (555, 37923), (1665, 12641)]