21785115

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6949}}^1$

素因数の和:6987

約数の個数: 32

約数和(自身を含む): 40032000

約数和(自身を除く): 18246885

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 165, 209, 285, 627, 1045, 3135, 6949, 20847, 34745, 76439, 104235, 132031, 229317, 382195, 396093, 660155, 1146585, 1452341, 1980465, 4357023, 7261705, 21785115]

約数ペア:

[(1, 21785115), (3, 7261705), (5, 4357023), (11, 1980465), (15, 1452341), (19, 1146585), (33, 660155), (55, 396093), (57, 382195), (95, 229317), (165, 132031), (209, 104235), (285, 76439), (627, 34745), (1045, 20847), (3135, 6949)]