28017725

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:509

約数の個数: 24

約数和(自身を含む): 36173280

約数和(自身を除く): 8155555

約数列:

[1, 5, 25, 43, 67, 215, 335, 389, 1075, 1675, 1945, 2881, 9725, 14405, 16727, 26063, 72025, 83635, 130315, 418175, 651575, 1120709, 5603545, 28017725]

約数ペア:

[(1, 28017725), (5, 5603545), (25, 1120709), (43, 651575), (67, 418175), (215, 130315), (335, 83635), (389, 72025), (1075, 26063), (1675, 16727), (1945, 14405), (2881, 9725)]