21891895

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{4903}}^1$

素因数の和:4974

約数の個数: 16

約数和(自身を含む): 28247040

約数和(自身を除く): 6355145

約数列:

[1, 5, 19, 47, 95, 235, 893, 4465, 4903, 24515, 93157, 230441, 465785, 1152205, 4378379, 21891895]

約数ペア:

[(1, 21891895), (5, 4378379), (19, 1152205), (47, 465785), (95, 230441), (235, 93157), (893, 24515), (4465, 4903)]