21028425

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{359}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 17540535

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 71, 75, 165, 213, 275, 355, 359, 781, 825, 1065, 1077, 1775, 1795, 2343, 3905, 3949, 5325, 5385, 8975, 11715, 11847, 19525, 19745, 25489, 26925, 58575, 59235, 76467, 98725, 127445, 280379, 296175, 382335, 637225, 841137, 1401895, 1911675, 4205685, 7009475, 21028425]

約数ペア:

[(1, 21028425), (3, 7009475), (5, 4205685), (11, 1911675), (15, 1401895), (25, 841137), (33, 637225), (55, 382335), (71, 296175), (75, 280379), (165, 127445), (213, 98725), (275, 76467), (355, 59235), (359, 58575), (781, 26925), (825, 25489), (1065, 19745), (1077, 19525), (1775, 11847), (1795, 11715), (2343, 8975), (3905, 5385), (3949, 5325)]