21217977

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{359}}^1$

素因数の和:578

約数の個数: 32

約数和(自身を含む): 34560000

約数和(自身を除く): 13342023

約数列:

[1, 3, 9, 11, 27, 33, 99, 199, 297, 359, 597, 1077, 1791, 2189, 3231, 3949, 5373, 6567, 9693, 11847, 19701, 35541, 59103, 71441, 106623, 214323, 642969, 785851, 1928907, 2357553, 7072659, 21217977]

約数ペア:

[(1, 21217977), (3, 7072659), (9, 2357553), (11, 1928907), (27, 785851), (33, 642969), (99, 214323), (199, 106623), (297, 71441), (359, 59103), (597, 35541), (1077, 19701), (1791, 11847), (2189, 9693), (3231, 6567), (3949, 5373)]