21212889

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{569}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 30798240

約数和(自身を除く): 9585351

約数列:

[1, 3, 17, 43, 51, 129, 289, 569, 731, 867, 1707, 2193, 9673, 12427, 24467, 29019, 37281, 73401, 164441, 415939, 493323, 1247817, 7070963, 21212889]

約数ペア:

[(1, 21212889), (3, 7070963), (17, 1247817), (43, 493323), (51, 415939), (129, 164441), (289, 73401), (569, 37281), (731, 29019), (867, 24467), (1707, 12427), (2193, 9673)]