21686319

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{18679}}^1$

素因数の和:18731

約数の個数: 16

約数和(自身を含む): 32876800

約数和(自身を除く): 11190481

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 18679, 56037, 168111, 504333, 803197, 2409591, 7228773, 21686319]

約数ペア:

[(1, 21686319), (3, 7228773), (9, 2409591), (27, 803197), (43, 504333), (129, 168111), (387, 56037), (1161, 18679)]