28705185

素因数分解:

$3^4\times 5^1\times {\mathrm{70877}}^1$

素因数の和:70894

約数の個数: 20

約数和(自身を含む): 51457428

約数和(自身を除く): 22752243

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 70877, 212631, 354385, 637893, 1063155, 1913679, 3189465, 5741037, 9568395, 28705185]

約数ペア:

[(1, 28705185), (3, 9568395), (5, 5741037), (9, 3189465), (15, 1913679), (27, 1063155), (45, 637893), (81, 354385), (135, 212631), (405, 70877)]