21091767

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{7873}}^1$

素因数の和:7942

約数の個数: 16

約数和(自身を含む): 30236160

約数和(自身を除く): 9144393

約数列:

[1, 3, 19, 47, 57, 141, 893, 2679, 7873, 23619, 149587, 370031, 448761, 1110093, 7030589, 21091767]

約数ペア:

[(1, 21091767), (3, 7030589), (19, 1110093), (47, 448761), (57, 370031), (141, 149587), (893, 23619), (2679, 7873)]