21064293

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13687}}^1$

素因数の和:13718

約数の個数: 20

約数和(自身を含む): 33124960

約数和(自身を除く): 12060667

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13687, 41061, 123183, 260053, 369549, 780159, 1108647, 2340477, 7021431, 21064293]

約数ペア:

[(1, 21064293), (3, 7021431), (9, 2340477), (19, 1108647), (27, 780159), (57, 369549), (81, 260053), (171, 123183), (513, 41061), (1539, 13687)]