20809555

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{823}}^1$

素因数の和:1230

約数の個数: 16

約数和(自身を含む): 26994240

約数和(自身を除く): 6184685

約数列:

[1, 5, 13, 65, 389, 823, 1945, 4115, 5057, 10699, 25285, 53495, 320147, 1600735, 4161911, 20809555]

約数ペア:

[(1, 20809555), (5, 4161911), (13, 1600735), (65, 320147), (389, 53495), (823, 25285), (1945, 10699), (4115, 5057)]