20158821

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1187}}^1$

素因数の和:1250

約数の個数: 32

約数和(自身を含む): 32503680

約数和(自身を除く): 12344859

約数列:

[1, 3, 9, 17, 27, 37, 51, 111, 153, 333, 459, 629, 999, 1187, 1887, 3561, 5661, 10683, 16983, 20179, 32049, 43919, 60537, 131757, 181611, 395271, 544833, 746623, 1185813, 2239869, 6719607, 20158821]

約数ペア:

[(1, 20158821), (3, 6719607), (9, 2239869), (17, 1185813), (27, 746623), (37, 544833), (51, 395271), (111, 181611), (153, 131757), (333, 60537), (459, 43919), (629, 32049), (999, 20179), (1187, 16983), (1887, 10683), (3561, 5661)]