21047708

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43487}}^1$

素因数の和:43513

約数の個数: 18

約数和(自身を含む): 40487328

約数和(自身を除く): 19439620

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43487, 86974, 173948, 478357, 956714, 1913428, 5261927, 10523854, 21047708]

約数ペア:

[(1, 21047708), (2, 10523854), (4, 5261927), (11, 1913428), (22, 956714), (44, 478357), (121, 173948), (242, 86974), (484, 43487)]