21840435

素因数分解:

$3^4\times 5^1\times {\mathrm{53927}}^1$

素因数の和:53944

約数の個数: 20

約数和(自身を含む): 39151728

約数和(自身を除く): 17311293

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53927, 161781, 269635, 485343, 808905, 1456029, 2426715, 4368087, 7280145, 21840435]

約数ペア:

[(1, 21840435), (3, 7280145), (5, 4368087), (9, 2426715), (15, 1456029), (27, 808905), (45, 485343), (81, 269635), (135, 161781), (405, 53927)]