128439

素因数分解:

$3^3\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:147

約数の個数: 16

約数和(自身を含む): 195840

約数和(自身を除く): 67401

約数列:

[1, 3, 9, 27, 67, 71, 201, 213, 603, 639, 1809, 1917, 4757, 14271, 42813, 128439]

約数ペア:

[(1, 128439), (3, 42813), (9, 14271), (27, 4757), (67, 1917), (71, 1809), (201, 639), (213, 603)]