21408519

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{15823}}^1$

素因数の和:15878

約数の個数: 16

約数和(自身を含む): 31901184

約数和(自身を除く): 10492665

約数列:

[1, 3, 11, 33, 41, 123, 451, 1353, 15823, 47469, 174053, 522159, 648743, 1946229, 7136173, 21408519]

約数ペア:

[(1, 21408519), (3, 7136173), (11, 1946229), (33, 648743), (41, 522159), (123, 174053), (451, 47469), (1353, 15823)]