18887275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{397}}^1$

素因数の和:591

約数の個数: 24

約数和(自身を含む): 25761744

約数和(自身を除く): 6874469

約数列:

[1, 5, 11, 25, 55, 173, 275, 397, 865, 1903, 1985, 4325, 4367, 9515, 9925, 21835, 47575, 68681, 109175, 343405, 755491, 1717025, 3777455, 18887275]

約数ペア:

[(1, 18887275), (5, 3777455), (11, 1717025), (25, 755491), (55, 343405), (173, 109175), (275, 68681), (397, 47575), (865, 21835), (1903, 9925), (1985, 9515), (4325, 4367)]