18991251

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{1583}}^1$

素因数の和:1663

約数の個数: 24

約数和(自身を含む): 28993536

約数和(自身を除く): 10002285

約数列:

[1, 3, 9, 31, 43, 93, 129, 279, 387, 1333, 1583, 3999, 4749, 11997, 14247, 49073, 68069, 147219, 204207, 441657, 612621, 2110139, 6330417, 18991251]

約数ペア:

[(1, 18991251), (3, 6330417), (9, 2110139), (31, 612621), (43, 441657), (93, 204207), (129, 147219), (279, 68069), (387, 49073), (1333, 14247), (1583, 11997), (3999, 4749)]