18720404

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{223}}^1\times {\mathrm{677}}^1$

素因数の和:935

約数の個数: 24

約数和(自身を含む): 34019328

約数和(自身を除く): 15298924

約数列:

[1, 2, 4, 31, 62, 124, 223, 446, 677, 892, 1354, 2708, 6913, 13826, 20987, 27652, 41974, 83948, 150971, 301942, 603884, 4680101, 9360202, 18720404]

約数ペア:

[(1, 18720404), (2, 9360202), (4, 4680101), (31, 603884), (62, 301942), (124, 150971), (223, 83948), (446, 41974), (677, 27652), (892, 20987), (1354, 13826), (2708, 6913)]