21540775

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{449}}^1$

素因数の和:579

約数の個数: 24

約数和(自身を含む): 28458000

約数和(自身を除く): 6917225

約数列:

[1, 5, 19, 25, 95, 101, 449, 475, 505, 1919, 2245, 2525, 8531, 9595, 11225, 42655, 45349, 47975, 213275, 226745, 861631, 1133725, 4308155, 21540775]

約数ペア:

[(1, 21540775), (5, 4308155), (19, 1133725), (25, 861631), (95, 226745), (101, 213275), (449, 47975), (475, 45349), (505, 42655), (1919, 11225), (2245, 9595), (2525, 8531)]