290385

素因数分解:

$3^5\times 5^1\times {\mathrm{239}}^1$

素因数の和:259

約数の個数: 24

約数和(自身を含む): 524160

約数和(自身を除く): 233775

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 239, 243, 405, 717, 1195, 1215, 2151, 3585, 6453, 10755, 19359, 32265, 58077, 96795, 290385]

約数ペア:

[(1, 290385), (3, 96795), (5, 58077), (9, 32265), (15, 19359), (27, 10755), (45, 6453), (81, 3585), (135, 2151), (239, 1215), (243, 1195), (405, 717)]