21495939

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{521}}^1\times {\mathrm{809}}^1$

素因数の和:1350

約数の個数: 16

約数和(自身を含む): 30443040

約数和(自身を除く): 8947101

約数列:

[1, 3, 17, 51, 521, 809, 1563, 2427, 8857, 13753, 26571, 41259, 421489, 1264467, 7165313, 21495939]

約数ペア:

[(1, 21495939), (3, 7165313), (17, 1264467), (51, 421489), (521, 41259), (809, 26571), (1563, 13753), (2427, 8857)]