21439809

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13931}}^1$

素因数の和:13962

約数の個数: 20

約数和(自身を含む): 33715440

約数和(自身を除く): 12275631

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13931, 41793, 125379, 264689, 376137, 794067, 1128411, 2382201, 7146603, 21439809]

約数ペア:

[(1, 21439809), (3, 7146603), (9, 2382201), (19, 1128411), (27, 794067), (57, 376137), (81, 264689), (171, 125379), (513, 41793), (1539, 13931)]