20017959

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{277}}^1$

素因数の和:419

約数の個数: 32

約数和(自身を含む): 30824640

約数和(自身を除く): 10806681

約数列:

[1, 3, 13, 17, 39, 51, 109, 221, 277, 327, 663, 831, 1417, 1853, 3601, 4251, 4709, 5559, 10803, 14127, 24089, 30193, 61217, 72267, 90579, 183651, 392509, 513281, 1177527, 1539843, 6672653, 20017959]

約数ペア:

[(1, 20017959), (3, 6672653), (13, 1539843), (17, 1177527), (39, 513281), (51, 392509), (109, 183651), (221, 90579), (277, 72267), (327, 61217), (663, 30193), (831, 24089), (1417, 14127), (1853, 10803), (3601, 5559), (4251, 4709)]