21331311

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 31477248

約数和(自身を除く): 10145937

約数列:

[1, 3, 17, 43, 51, 71, 129, 137, 213, 411, 731, 1207, 2193, 2329, 3053, 3621, 5891, 6987, 9159, 9727, 17673, 29181, 51901, 100147, 155703, 165359, 300441, 418261, 496077, 1254783, 7110437, 21331311]

約数ペア:

[(1, 21331311), (3, 7110437), (17, 1254783), (43, 496077), (51, 418261), (71, 300441), (129, 165359), (137, 155703), (213, 100147), (411, 51901), (731, 29181), (1207, 17673), (2193, 9727), (2329, 9159), (3053, 6987), (3621, 5891)]