20947017

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{277}}^2$

素因数の和:577

約数の個数: 24

約数和(自身を含む): 34499136

約数和(自身を除く): 13552119

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 277, 831, 1939, 3601, 5817, 10803, 25207, 75621, 76729, 230187, 537103, 997477, 1611309, 2992431, 6982339, 20947017]

約数ペア:

[(1, 20947017), (3, 6982339), (7, 2992431), (13, 1611309), (21, 997477), (39, 537103), (91, 230187), (273, 76729), (277, 75621), (831, 25207), (1939, 10803), (3601, 5817)]