21490888

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{65521}}^1$

素因数の和:65568

約数の個数: 16

約数和(自身を含む): 41278860

約数和(自身を除く): 19787972

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 65521, 131042, 262084, 524168, 2686361, 5372722, 10745444, 21490888]

約数ペア:

[(1, 21490888), (2, 10745444), (4, 5372722), (8, 2686361), (41, 524168), (82, 262084), (164, 131042), (328, 65521)]