20288540

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4549}}^1$

素因数の和:4781

約数の個数: 24

約数和(自身を含む): 42806400

約数和(自身を除く): 22517860

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4549, 9098, 18196, 22745, 45490, 90980, 1014427, 2028854, 4057708, 5072135, 10144270, 20288540]

約数ペア:

[(1, 20288540), (2, 10144270), (4, 5072135), (5, 4057708), (10, 2028854), (20, 1014427), (223, 90980), (446, 45490), (892, 22745), (1115, 18196), (2230, 9098), (4460, 4549)]