21813255

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11273}}^1$

素因数の和:11327

約数の個数: 24

約数和(自身を含む): 38692368

約数和(自身を除く): 16879113

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 11273, 33819, 56365, 101457, 169095, 484739, 507285, 1454217, 2423695, 4362651, 7271085, 21813255]

約数ペア:

[(1, 21813255), (3, 7271085), (5, 4362651), (9, 2423695), (15, 1454217), (43, 507285), (45, 484739), (129, 169095), (215, 101457), (387, 56365), (645, 33819), (1935, 11273)]