20991178

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{6163}}^1$

素因数の和:6309

約数の個数: 16

約数和(自身を含む): 34173216

約数和(自身を除く): 13182038

約数列:

[1, 2, 13, 26, 131, 262, 1703, 3406, 6163, 12326, 80119, 160238, 807353, 1614706, 10495589, 20991178]

約数ペア:

[(1, 20991178), (2, 10495589), (13, 1614706), (26, 807353), (131, 160238), (262, 80119), (1703, 12326), (3406, 6163)]