21105730

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{661}}^1$

素因数の和:802

約数の個数: 32

約数和(自身を含む): 39656448

約数和(自身を除く): 18550718

約数列:

[1, 2, 5, 10, 31, 62, 103, 155, 206, 310, 515, 661, 1030, 1322, 3193, 3305, 6386, 6610, 15965, 20491, 31930, 40982, 68083, 102455, 136166, 204910, 340415, 680830, 2110573, 4221146, 10552865, 21105730]

約数ペア:

[(1, 21105730), (2, 10552865), (5, 4221146), (10, 2110573), (31, 680830), (62, 340415), (103, 204910), (155, 136166), (206, 102455), (310, 68083), (515, 40982), (661, 31930), (1030, 20491), (1322, 15965), (3193, 6610), (3305, 6386)]