21725825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{397}}^1$

素因数の和:617

約数の個数: 24

約数和(自身を含む): 29611200

約数和(自身を除く): 7885375

約数列:

[1, 5, 11, 25, 55, 199, 275, 397, 995, 1985, 2189, 4367, 4975, 9925, 10945, 21835, 54725, 79003, 109175, 395015, 869033, 1975075, 4345165, 21725825]

約数ペア:

[(1, 21725825), (5, 4345165), (11, 1975075), (25, 869033), (55, 395015), (199, 109175), (275, 79003), (397, 54725), (995, 21835), (1985, 10945), (2189, 9925), (4367, 4975)]