21301775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1091}}^1$

素因数の和:1183

約数の個数: 24

約数和(自身を含む): 29248128

約数和(自身を除く): 7946353

約数列:

[1, 5, 11, 25, 55, 71, 275, 355, 781, 1091, 1775, 3905, 5455, 12001, 19525, 27275, 60005, 77461, 300025, 387305, 852071, 1936525, 4260355, 21301775]

約数ペア:

[(1, 21301775), (5, 4260355), (11, 1936525), (25, 852071), (55, 387305), (71, 300025), (275, 77461), (355, 60005), (781, 27275), (1091, 19525), (1775, 12001), (3905, 5455)]