19939865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{2003}}^1$

素因数の和:2200

約数の個数: 16

約数和(自身を含む): 26260416

約数和(自身を除く): 6320551

約数列:

[1, 5, 11, 55, 181, 905, 1991, 2003, 9955, 10015, 22033, 110165, 362543, 1812715, 3987973, 19939865]

約数ペア:

[(1, 19939865), (5, 3987973), (11, 1812715), (55, 362543), (181, 110165), (905, 22033), (1991, 10015), (2003, 9955)]