19770881

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{653}}^1$

素因数の和:820

約数の個数: 16

約数和(自身を含む): 22743504

約数和(自身を除く): 2972623

約数列:

[1, 13, 17, 137, 221, 653, 1781, 2329, 8489, 11101, 30277, 89461, 144313, 1162993, 1520837, 19770881]

約数ペア:

[(1, 19770881), (13, 1520837), (17, 1162993), (137, 144313), (221, 89461), (653, 30277), (1781, 11101), (2329, 8489)]