1621215

素因数分解:

$3^4\times 5^1\times {\mathrm{4003}}^1$

素因数の和:4020

約数の個数: 20

約数和(自身を含む): 2906904

約数和(自身を除く): 1285689

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 4003, 12009, 20015, 36027, 60045, 108081, 180135, 324243, 540405, 1621215]

約数ペア:

[(1, 1621215), (3, 540405), (5, 324243), (9, 180135), (15, 108081), (27, 60045), (45, 36027), (81, 20015), (135, 12009), (405, 4003)]