21115509

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{1489}}^1$

素因数の和:1684

約数の個数: 16

約数和(自身を含む): 29323200

約数和(自身を除く): 8207691

約数列:

[1, 3, 29, 87, 163, 489, 1489, 4467, 4727, 14181, 43181, 129543, 242707, 728121, 7038503, 21115509]

約数ペア:

[(1, 21115509), (3, 7038503), (29, 728121), (87, 242707), (163, 129543), (489, 43181), (1489, 14181), (4467, 4727)]