21440187

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{313}}^1$

素因数の和:424

約数の個数: 32

約数和(自身を含む): 33158400

約数和(自身を除く): 11718213

約数列:

[1, 3, 9, 27, 43, 59, 129, 177, 313, 387, 531, 939, 1161, 1593, 2537, 2817, 7611, 8451, 13459, 18467, 22833, 40377, 55401, 68499, 121131, 166203, 363393, 498609, 794081, 2382243, 7146729, 21440187]

約数ペア:

[(1, 21440187), (3, 7146729), (9, 2382243), (27, 794081), (43, 498609), (59, 363393), (129, 166203), (177, 121131), (313, 68499), (387, 55401), (531, 40377), (939, 22833), (1161, 18467), (1593, 13459), (2537, 8451), (2817, 7611)]