21065205

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{10559}}^1$

素因数の和:10593

約数の個数: 32

約数和(自身を含む): 40550400

約数和(自身を除く): 19485195

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 10559, 31677, 52795, 73913, 158385, 200621, 221739, 369565, 601863, 1003105, 1108695, 1404347, 3009315, 4213041, 7021735, 21065205]

約数ペア:

[(1, 21065205), (3, 7021735), (5, 4213041), (7, 3009315), (15, 1404347), (19, 1108695), (21, 1003105), (35, 601863), (57, 369565), (95, 221739), (105, 200621), (133, 158385), (285, 73913), (399, 52795), (665, 31677), (1995, 10559)]