21788620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1511}}^1$

素因数の和:1630

約数の個数: 48

約数和(自身を含む): 52835328

約数和(自身を除く): 31046708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 103, 140, 206, 412, 515, 721, 1030, 1442, 1511, 2060, 2884, 3022, 3605, 6044, 7210, 7555, 10577, 14420, 15110, 21154, 30220, 42308, 52885, 105770, 155633, 211540, 311266, 622532, 778165, 1089431, 1556330, 2178862, 3112660, 4357724, 5447155, 10894310, 21788620]

約数ペア:

[(1, 21788620), (2, 10894310), (4, 5447155), (5, 4357724), (7, 3112660), (10, 2178862), (14, 1556330), (20, 1089431), (28, 778165), (35, 622532), (70, 311266), (103, 211540), (140, 155633), (206, 105770), (412, 52885), (515, 42308), (721, 30220), (1030, 21154), (1442, 15110), (1511, 14420), (2060, 10577), (2884, 7555), (3022, 7210), (3605, 6044)]