20813385

素因数分解:

$3^1\times 5^1\times {\mathrm{971}}^1\times {\mathrm{1429}}^1$

素因数の和:2408

約数の個数: 16

約数和(自身を含む): 33359040

約数和(自身を除く): 12545655

約数列:

[1, 3, 5, 15, 971, 1429, 2913, 4287, 4855, 7145, 14565, 21435, 1387559, 4162677, 6937795, 20813385]

約数ペア:

[(1, 20813385), (3, 6937795), (5, 4162677), (15, 1387559), (971, 21435), (1429, 14565), (2913, 7145), (4287, 4855)]