20811609

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{25411}}^1$

素因数の和:25437

約数の個数: 24

約数和(自身を含む): 36999872

約数和(自身を除く): 16188263

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 25411, 76233, 177877, 228699, 330343, 533631, 991029, 1600893, 2312401, 2973087, 6937203, 20811609]

約数ペア:

[(1, 20811609), (3, 6937203), (7, 2973087), (9, 2312401), (13, 1600893), (21, 991029), (39, 533631), (63, 330343), (91, 228699), (117, 177877), (273, 76233), (819, 25411)]