21123156987

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{739}}^1\times {\mathrm{73859}}^1$

素因数の和:74647

約数の個数: 24

約数和(自身を含む): 31263460800

約数和(自身を除く): 10140303813

約数列:

[1, 3, 9, 43, 129, 387, 739, 2217, 6651, 31777, 73859, 95331, 221577, 285993, 664731, 3175937, 9527811, 28583433, 54581801, 163745403, 491236209, 2347017443, 7041052329, 21123156987]

約数ペア:

[(1, 21123156987), (3, 7041052329), (9, 2347017443), (43, 491236209), (129, 163745403), (387, 54581801), (739, 28583433), (2217, 9527811), (6651, 3175937), (31777, 664731), (73859, 285993), (95331, 221577)]