20971953

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13627}}^1$

素因数の和:13658

約数の個数: 20

約数和(自身を含む): 32979760

約数和(自身を除く): 12007807

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13627, 40881, 122643, 258913, 367929, 776739, 1103787, 2330217, 6990651, 20971953]

約数ペア:

[(1, 20971953), (3, 6990651), (9, 2330217), (19, 1103787), (27, 776739), (57, 367929), (81, 258913), (171, 122643), (513, 40881), (1539, 13627)]