20090005

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18181}}^1$

素因数の和:18216

約数の個数: 16

約数和(自身を含む): 27491184

約数和(自身を除く): 7401179

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18181, 90905, 236353, 309077, 1181765, 1545385, 4018001, 20090005]

約数ペア:

[(1, 20090005), (5, 4018001), (13, 1545385), (17, 1181765), (65, 309077), (85, 236353), (221, 90905), (1105, 18181)]