21338553

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{71}}^2\times {\mathrm{83}}^1$

素因数の和:245

約数の個数: 24

約数和(自身を含む): 30923424

約数和(自身を除く): 9584871

約数列:

[1, 3, 17, 51, 71, 83, 213, 249, 1207, 1411, 3621, 4233, 5041, 5893, 15123, 17679, 85697, 100181, 257091, 300543, 418403, 1255209, 7112851, 21338553]

約数ペア:

[(1, 21338553), (3, 7112851), (17, 1255209), (51, 418403), (71, 300543), (83, 257091), (213, 100181), (249, 85697), (1207, 17679), (1411, 15123), (3621, 5893), (4233, 5041)]