21545540

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{10459}}^1$

素因数の和:10571

約数の個数: 24

約数和(自身を含む): 45689280

約数和(自身を除く): 24143740

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 10459, 20918, 41836, 52295, 104590, 209180, 1077277, 2154554, 4309108, 5386385, 10772770, 21545540]

約数ペア:

[(1, 21545540), (2, 10772770), (4, 5386385), (5, 4309108), (10, 2154554), (20, 1077277), (103, 209180), (206, 104590), (412, 52295), (515, 41836), (1030, 20918), (2060, 10459)]