21545121

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{1669}}^1$

素因数の和:2016

約数の個数: 16

約数和(自身を含む): 31048640

約数和(自身を除く): 9503519

約数列:

[1, 3, 13, 39, 331, 993, 1669, 4303, 5007, 12909, 21697, 65091, 552439, 1657317, 7181707, 21545121]

約数ペア:

[(1, 21545121), (3, 7181707), (13, 1657317), (39, 552439), (331, 65091), (993, 21697), (1669, 12909), (4303, 5007)]