21181615

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{3581}}^1$

素因数の和:3619

約数の個数: 24

約数和(自身を含む): 31464288

約数和(自身を除く): 10282673

約数列:

[1, 5, 7, 13, 35, 65, 91, 169, 455, 845, 1183, 3581, 5915, 17905, 25067, 46553, 125335, 232765, 325871, 605189, 1629355, 3025945, 4236323, 21181615]

約数ペア:

[(1, 21181615), (5, 4236323), (7, 3025945), (13, 1629355), (35, 605189), (65, 325871), (91, 232765), (169, 125335), (455, 46553), (845, 25067), (1183, 17905), (3581, 5915)]