409820

素因数分解:

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

素因数の和:701

約数の個数: 24

約数和(自身を含む): 889728

約数和(自身を除く): 479908

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 661, 1322, 2644, 3305, 6610, 13220, 20491, 40982, 81964, 102455, 204910, 409820]

約数ペア:

[(1, 409820), (2, 204910), (4, 102455), (5, 81964), (10, 40982), (20, 20491), (31, 13220), (62, 6610), (124, 3305), (155, 2644), (310, 1322), (620, 661)]