21258039

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 32237568

約数和(自身を除く): 10979529

約数列:

[1, 3, 11, 33, 43, 71, 129, 211, 213, 473, 633, 781, 1419, 2321, 2343, 3053, 6963, 9073, 9159, 14981, 27219, 33583, 44943, 99803, 100749, 164791, 299409, 494373, 644183, 1932549, 7086013, 21258039]

約数ペア:

[(1, 21258039), (3, 7086013), (11, 1932549), (33, 644183), (43, 494373), (71, 299409), (129, 164791), (211, 100749), (213, 99803), (473, 44943), (633, 33583), (781, 27219), (1419, 14981), (2321, 9159), (2343, 9073), (3053, 6963)]