21018881

素因数分解:

${\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{439}}^1$

素因数の和:608

約数の個数: 16

約数和(自身を含む): 23654400

約数和(自身を除く): 2635519

約数列:

[1, 13, 29, 127, 377, 439, 1651, 3683, 5707, 12731, 47879, 55753, 165503, 724789, 1616837, 21018881]

約数ペア:

[(1, 21018881), (13, 1616837), (29, 724789), (127, 165503), (377, 55753), (439, 47879), (1651, 12731), (3683, 5707)]