2557775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:223

約数の個数: 24

約数和(自身を含む): 3535488

約数和(自身を除く): 977713

約数列:

[1, 5, 11, 25, 55, 71, 131, 275, 355, 655, 781, 1441, 1775, 3275, 3905, 7205, 9301, 19525, 36025, 46505, 102311, 232525, 511555, 2557775]

約数ペア:

[(1, 2557775), (5, 511555), (11, 232525), (25, 102311), (55, 46505), (71, 36025), (131, 19525), (275, 9301), (355, 7205), (655, 3905), (781, 3275), (1441, 1775)]