21990296

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{727}}^1$

素因数の和:951

約数の個数: 32

約数和(自身を含む): 43680000

約数和(自身を除く): 21689704

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 199, 398, 727, 796, 1454, 1592, 2908, 3781, 5816, 7562, 13813, 15124, 27626, 30248, 55252, 110504, 144673, 289346, 578692, 1157384, 2748787, 5497574, 10995148, 21990296]

約数ペア:

[(1, 21990296), (2, 10995148), (4, 5497574), (8, 2748787), (19, 1157384), (38, 578692), (76, 289346), (152, 144673), (199, 110504), (398, 55252), (727, 30248), (796, 27626), (1454, 15124), (1592, 13813), (2908, 7562), (3781, 5816)]