18884020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{103}}^2$

素因数の和:304

約数の個数: 36

約数和(自身を含む): 40495140

約数和(自身を除く): 21611120

約数列:

[1, 2, 4, 5, 10, 20, 89, 103, 178, 206, 356, 412, 445, 515, 890, 1030, 1780, 2060, 9167, 10609, 18334, 21218, 36668, 42436, 45835, 53045, 91670, 106090, 183340, 212180, 944201, 1888402, 3776804, 4721005, 9442010, 18884020]

約数ペア:

[(1, 18884020), (2, 9442010), (4, 4721005), (5, 3776804), (10, 1888402), (20, 944201), (89, 212180), (103, 183340), (178, 106090), (206, 91670), (356, 53045), (412, 45835), (445, 42436), (515, 36668), (890, 21218), (1030, 18334), (1780, 10609), (2060, 9167)]