21492978

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{3881}}^1$

素因数の和:3970

約数の個数: 32

約数和(自身を含む): 46956672

約数和(自身を除く): 25463694

約数列:

[1, 2, 3, 6, 13, 26, 39, 71, 78, 142, 213, 426, 923, 1846, 2769, 3881, 5538, 7762, 11643, 23286, 50453, 100906, 151359, 275551, 302718, 551102, 826653, 1653306, 3582163, 7164326, 10746489, 21492978]

約数ペア:

[(1, 21492978), (2, 10746489), (3, 7164326), (6, 3582163), (13, 1653306), (26, 826653), (39, 551102), (71, 302718), (78, 275551), (142, 151359), (213, 100906), (426, 50453), (923, 23286), (1846, 11643), (2769, 7762), (3881, 5538)]