18830120

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2111}}^1$

素因数の和:2345

約数の個数: 32

約数和(自身を含む): 42577920

約数和(自身を除く): 23747800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2111, 2230, 4222, 4460, 8444, 8920, 10555, 16888, 21110, 42220, 84440, 470753, 941506, 1883012, 2353765, 3766024, 4707530, 9415060, 18830120]

約数ペア:

[(1, 18830120), (2, 9415060), (4, 4707530), (5, 3766024), (8, 2353765), (10, 1883012), (20, 941506), (40, 470753), (223, 84440), (446, 42220), (892, 21110), (1115, 16888), (1784, 10555), (2111, 8920), (2230, 8444), (4222, 4460)]