20640285

素因数分解:

$3^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{3253}}^1$

素因数の和:3314

約数の個数: 32

約数和(自身を含む): 37486080

約数和(自身を除く): 16845795

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 135, 141, 235, 423, 705, 1269, 2115, 3253, 6345, 9759, 16265, 29277, 48795, 87831, 146385, 152891, 439155, 458673, 764455, 1376019, 2293365, 4128057, 6880095, 20640285]

約数ペア:

[(1, 20640285), (3, 6880095), (5, 4128057), (9, 2293365), (15, 1376019), (27, 764455), (45, 458673), (47, 439155), (135, 152891), (141, 146385), (235, 87831), (423, 48795), (705, 29277), (1269, 16265), (2115, 9759), (3253, 6345)]