21084805

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19433}}^1$

素因数の和:19476

約数の個数: 16

約数和(自身を含む): 29850624

約数和(自身を除く): 8765819

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19433, 97165, 136031, 602423, 680155, 3012115, 4216961, 21084805]

約数ペア:

[(1, 21084805), (5, 4216961), (7, 3012115), (31, 680155), (35, 602423), (155, 136031), (217, 97165), (1085, 19433)]