21028215

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107837}}^1$

素因数の和:107858

約数の個数: 16

約数和(自身を含む): 36233568

約数和(自身を除く): 15205353

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 107837, 323511, 539185, 1401881, 1617555, 4205643, 7009405, 21028215]

約数ペア:

[(1, 21028215), (3, 7009405), (5, 4205643), (13, 1617555), (15, 1401881), (39, 539185), (65, 323511), (195, 107837)]