21388466

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{13693}}^1$

素因数の和:13777

約数の個数: 16

約数和(自身を含む): 35494848

約数和(自身を除く): 14106382

約数列:

[1, 2, 11, 22, 71, 142, 781, 1562, 13693, 27386, 150623, 301246, 972203, 1944406, 10694233, 21388466]

約数ペア:

[(1, 21388466), (2, 10694233), (11, 1944406), (22, 972203), (71, 301246), (142, 150623), (781, 27386), (1562, 13693)]