21581937

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{61487}}^1$

素因数の和:61509

約数の個数: 16

約数和(自身を含む): 34433280

約数和(自身を除く): 12851343

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 61487, 184461, 553383, 799331, 1660149, 2397993, 7193979, 21581937]

約数ペア:

[(1, 21581937), (3, 7193979), (9, 2397993), (13, 1660149), (27, 799331), (39, 553383), (117, 184461), (351, 61487)]