261981

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{313}}^1$

素因数の和:353

約数の個数: 16

約数和(自身を含む): 401920

約数和(自身を除く): 139939

約数列:

[1, 3, 9, 27, 31, 93, 279, 313, 837, 939, 2817, 8451, 9703, 29109, 87327, 261981]

約数ペア:

[(1, 261981), (3, 87327), (9, 29109), (27, 9703), (31, 8451), (93, 2817), (279, 939), (313, 837)]