20523255

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{677}}^1$

素因数の和:775

約数の個数: 32

約数和(自身を含む): 34366464

約数和(自身を除く): 13843209

約数列:

[1, 3, 5, 15, 43, 47, 129, 141, 215, 235, 645, 677, 705, 2021, 2031, 3385, 6063, 10105, 10155, 29111, 30315, 31819, 87333, 95457, 145555, 159095, 436665, 477285, 1368217, 4104651, 6841085, 20523255]

約数ペア:

[(1, 20523255), (3, 6841085), (5, 4104651), (15, 1368217), (43, 477285), (47, 436665), (129, 159095), (141, 145555), (215, 95457), (235, 87333), (645, 31819), (677, 30315), (705, 29111), (2021, 10155), (2031, 10105), (3385, 6063)]