21532905

素因数分解:

$3^3\times 5^1\times {\mathrm{159503}}^1$

素因数の和:159517

約数の個数: 16

約数和(自身を含む): 38280960

約数和(自身を除く): 16748055

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 159503, 478509, 797515, 1435527, 2392545, 4306581, 7177635, 21532905]

約数ペア:

[(1, 21532905), (3, 7177635), (5, 4306581), (9, 2392545), (15, 1435527), (27, 797515), (45, 478509), (135, 159503)]