28640385

素因数分解:

$3^4\times 5^1\times {\mathrm{70717}}^1$

素因数の和:70734

約数の個数: 20

約数和(自身を含む): 51341268

約数和(自身を除く): 22700883

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 70717, 212151, 353585, 636453, 1060755, 1909359, 3182265, 5728077, 9546795, 28640385]

約数ペア:

[(1, 28640385), (3, 9546795), (5, 5728077), (9, 3182265), (15, 1909359), (27, 1060755), (45, 636453), (81, 353585), (135, 212151), (405, 70717)]