420740

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:311

約数の個数: 24

約数和(自身を含む): 896280

約数和(自身を除く): 475540

約数列:

[1, 2, 4, 5, 10, 20, 109, 193, 218, 386, 436, 545, 772, 965, 1090, 1930, 2180, 3860, 21037, 42074, 84148, 105185, 210370, 420740]

約数ペア:

[(1, 420740), (2, 210370), (4, 105185), (5, 84148), (10, 42074), (20, 21037), (109, 3860), (193, 2180), (218, 1930), (386, 1090), (436, 965), (545, 772)]