21109575

素因数分解:

$3^1\times 5^2\times {\mathrm{149}}^1\times {\mathrm{1889}}^1$

素因数の和:2051

約数の個数: 24

約数和(自身を含む): 35154000

約数和(自身を除く): 14044425

約数列:

[1, 3, 5, 15, 25, 75, 149, 447, 745, 1889, 2235, 3725, 5667, 9445, 11175, 28335, 47225, 141675, 281461, 844383, 1407305, 4221915, 7036525, 21109575]

約数ペア:

[(1, 21109575), (3, 7036525), (5, 4221915), (15, 1407305), (25, 844383), (75, 281461), (149, 141675), (447, 47225), (745, 28335), (1889, 11175), (2235, 9445), (3725, 5667)]