20697921

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{677}}^1$

素因数の和:805

約数の個数: 24

約数和(自身を含む): 31025280

約数和(自身を除く): 10327359

約数列:

[1, 3, 9, 43, 79, 129, 237, 387, 677, 711, 2031, 3397, 6093, 10191, 29111, 30573, 53483, 87333, 160449, 261999, 481347, 2299769, 6899307, 20697921]

約数ペア:

[(1, 20697921), (3, 6899307), (9, 2299769), (43, 481347), (79, 261999), (129, 160449), (237, 87333), (387, 53483), (677, 30573), (711, 29111), (2031, 10191), (3397, 6093)]