21043971

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1373}}^1$

素因数の和:1523

約数の個数: 24

約数和(自身を含む): 33008976

約数和(自身を除く): 11965005

約数列:

[1, 3, 9, 13, 39, 117, 131, 393, 1179, 1373, 1703, 4119, 5109, 12357, 15327, 17849, 53547, 160641, 179863, 539589, 1618767, 2338219, 7014657, 21043971]

約数ペア:

[(1, 21043971), (3, 7014657), (9, 2338219), (13, 1618767), (39, 539589), (117, 179863), (131, 160641), (393, 53547), (1179, 17849), (1373, 15327), (1703, 12357), (4119, 5109)]