21209217

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{2111}}^1$

素因数の和:2328

約数の個数: 16

約数和(自身を含む): 30108672

約数和(自身を除く): 8899455

約数列:

[1, 3, 17, 51, 197, 591, 2111, 3349, 6333, 10047, 35887, 107661, 415867, 1247601, 7069739, 21209217]

約数ペア:

[(1, 21209217), (3, 7069739), (17, 1247601), (51, 415867), (197, 107661), (591, 35887), (2111, 10047), (3349, 6333)]