21291738

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{272971}}^1$

素因数の和:272989

約数の個数: 16

約数和(自身を含む): 45859296

約数和(自身を除く): 24567558

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 272971, 545942, 818913, 1637826, 3548623, 7097246, 10645869, 21291738]

約数ペア:

[(1, 21291738), (2, 10645869), (3, 7097246), (6, 3548623), (13, 1637826), (26, 818913), (39, 545942), (78, 272971)]