21271895

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{1697}}^1$

素因数の和:1834

約数の個数: 16

約数和(自身を含む): 26896320

約数和(自身を除く): 5624425

約数列:

[1, 5, 23, 109, 115, 545, 1697, 2507, 8485, 12535, 39031, 184973, 195155, 924865, 4254379, 21271895]

約数ペア:

[(1, 21271895), (5, 4254379), (23, 924865), (109, 195155), (115, 184973), (545, 39031), (1697, 12535), (2507, 8485)]