19916440

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1601}}^1$

素因数の和:1923

約数の個数: 32

約数和(自身を含む): 44984160

約数和(自身を除く): 25067720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 1601, 2488, 3110, 3202, 6220, 6404, 8005, 12440, 12808, 16010, 32020, 64040, 497911, 995822, 1991644, 2489555, 3983288, 4979110, 9958220, 19916440]

約数ペア:

[(1, 19916440), (2, 9958220), (4, 4979110), (5, 3983288), (8, 2489555), (10, 1991644), (20, 995822), (40, 497911), (311, 64040), (622, 32020), (1244, 16010), (1555, 12808), (1601, 12440), (2488, 8005), (3110, 6404), (3202, 6220)]