18773909

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{571}}^1$

素因数の和:657

約数の個数: 24

約数和(自身を含む): 24257376

約数和(自身を除く): 5483467

約数列:

[1, 7, 11, 49, 61, 77, 427, 539, 571, 671, 2989, 3997, 4697, 6281, 27979, 32879, 34831, 43967, 243817, 307769, 383141, 1706719, 2681987, 18773909]

約数ペア:

[(1, 18773909), (7, 2681987), (11, 1706719), (49, 383141), (61, 307769), (77, 243817), (427, 43967), (539, 34831), (571, 32879), (671, 27979), (2989, 6281), (3997, 4697)]