20861321

素因数分解:

${\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{557}}^1$

素因数の和:680

約数の個数: 16

約数和(自身を含む): 23373504

約数和(自身を除く): 2512183

約数列:

[1, 13, 43, 67, 557, 559, 871, 2881, 7241, 23951, 37319, 37453, 311363, 485147, 1604717, 20861321]

約数ペア:

[(1, 20861321), (13, 1604717), (43, 485147), (67, 311363), (557, 37453), (559, 37319), (871, 23951), (2881, 7241)]