21197825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4057}}^1$

素因数の和:4097

約数の個数: 24

約数和(自身を含む): 30191520

約数和(自身を除く): 8993695

約数列:

[1, 5, 11, 19, 25, 55, 95, 209, 275, 475, 1045, 4057, 5225, 20285, 44627, 77083, 101425, 223135, 385415, 847913, 1115675, 1927075, 4239565, 21197825]

約数ペア:

[(1, 21197825), (5, 4239565), (11, 1927075), (19, 1115675), (25, 847913), (55, 385415), (95, 223135), (209, 101425), (275, 77083), (475, 44627), (1045, 20285), (4057, 5225)]