21430180

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{103}}^2$

素因数の和:316

約数の個数: 36

約数和(自身を含む): 45894492

約数和(自身を除く): 24464312

約数列:

[1, 2, 4, 5, 10, 20, 101, 103, 202, 206, 404, 412, 505, 515, 1010, 1030, 2020, 2060, 10403, 10609, 20806, 21218, 41612, 42436, 52015, 53045, 104030, 106090, 208060, 212180, 1071509, 2143018, 4286036, 5357545, 10715090, 21430180]

約数ペア:

[(1, 21430180), (2, 10715090), (4, 5357545), (5, 4286036), (10, 2143018), (20, 1071509), (101, 212180), (103, 208060), (202, 106090), (206, 104030), (404, 53045), (412, 52015), (505, 42436), (515, 41612), (1010, 21218), (1030, 20806), (2020, 10609), (2060, 10403)]