21288375

素因数分解:

$3^2\times 5^3\times {\mathrm{127}}^1\times {\mathrm{149}}^1$

素因数の和:297

約数の個数: 48

約数和(自身を含む): 38937600

約数和(自身を除く): 17649225

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 127, 149, 225, 375, 381, 447, 635, 745, 1125, 1143, 1341, 1905, 2235, 3175, 3725, 5715, 6705, 9525, 11175, 15875, 18625, 18923, 28575, 33525, 47625, 55875, 56769, 94615, 142875, 167625, 170307, 283845, 473075, 851535, 1419225, 2365375, 4257675, 7096125, 21288375]

約数ペア:

[(1, 21288375), (3, 7096125), (5, 4257675), (9, 2365375), (15, 1419225), (25, 851535), (45, 473075), (75, 283845), (125, 170307), (127, 167625), (149, 142875), (225, 94615), (375, 56769), (381, 55875), (447, 47625), (635, 33525), (745, 28575), (1125, 18923), (1143, 18625), (1341, 15875), (1905, 11175), (2235, 9525), (3175, 6705), (3725, 5715)]