21785907

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1181}}^1$

素因数の和:1251

約数の個数: 32

約数和(自身を含む): 34949376

約数和(自身を除く): 13163469

約数列:

[1, 3, 11, 13, 33, 39, 43, 129, 143, 429, 473, 559, 1181, 1419, 1677, 3543, 6149, 12991, 15353, 18447, 38973, 46059, 50783, 152349, 168883, 506649, 558613, 660179, 1675839, 1980537, 7261969, 21785907]

約数ペア:

[(1, 21785907), (3, 7261969), (11, 1980537), (13, 1675839), (33, 660179), (39, 558613), (43, 506649), (129, 168883), (143, 152349), (429, 50783), (473, 46059), (559, 38973), (1181, 18447), (1419, 15353), (1677, 12991), (3543, 6149)]