21200725

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{9319}}^1$

素因数の和:9349

約数の個数: 24

約数和(自身を含む): 32359040

約数和(自身を除く): 11158315

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 9319, 46595, 65233, 121147, 232975, 326165, 605735, 848029, 1630825, 3028675, 4240145, 21200725]

約数ペア:

[(1, 21200725), (5, 4240145), (7, 3028675), (13, 1630825), (25, 848029), (35, 605735), (65, 326165), (91, 232975), (175, 121147), (325, 65233), (455, 46595), (2275, 9319)]