20205855

素因数分解:

$3^4\times 5^1\times {\mathrm{49891}}^1$

素因数の和:49908

約数の個数: 20

約数和(自身を含む): 36221592

約数和(自身を除く): 16015737

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49891, 149673, 249455, 449019, 748365, 1347057, 2245095, 4041171, 6735285, 20205855]

約数ペア:

[(1, 20205855), (3, 6735285), (5, 4041171), (9, 2245095), (15, 1347057), (27, 748365), (45, 449019), (81, 249455), (135, 149673), (405, 49891)]