21090645

素因数分解:

$3^3\times 5^1\times {\mathrm{156227}}^1$

素因数の和:156241

約数の個数: 16

約数和(自身を含む): 37494720

約数和(自身を除く): 16404075

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 156227, 468681, 781135, 1406043, 2343405, 4218129, 7030215, 21090645]

約数ペア:

[(1, 21090645), (3, 7030215), (5, 4218129), (9, 2343405), (15, 1406043), (27, 781135), (45, 468681), (135, 156227)]