18840575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1999}}^1$

素因数の和:2051

約数の個数: 24

約数和(自身を含む): 26040000

約数和(自身を除く): 7199425

約数列:

[1, 5, 13, 25, 29, 65, 145, 325, 377, 725, 1885, 1999, 9425, 9995, 25987, 49975, 57971, 129935, 289855, 649675, 753623, 1449275, 3768115, 18840575]

約数ペア:

[(1, 18840575), (5, 3768115), (13, 1449275), (25, 753623), (29, 649675), (65, 289855), (145, 129935), (325, 57971), (377, 49975), (725, 25987), (1885, 9995), (1999, 9425)]