18720436

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{709}}^1$

素因数の和:784

約数の個数: 48

約数和(自身を含む): 40078080

約数和(自身を除く): 21357644

約数列:

[1, 2, 4, 7, 14, 23, 28, 41, 46, 82, 92, 161, 164, 287, 322, 574, 644, 709, 943, 1148, 1418, 1886, 2836, 3772, 4963, 6601, 9926, 13202, 16307, 19852, 26404, 29069, 32614, 58138, 65228, 114149, 116276, 203483, 228298, 406966, 456596, 668587, 813932, 1337174, 2674348, 4680109, 9360218, 18720436]

約数ペア:

[(1, 18720436), (2, 9360218), (4, 4680109), (7, 2674348), (14, 1337174), (23, 813932), (28, 668587), (41, 456596), (46, 406966), (82, 228298), (92, 203483), (161, 116276), (164, 114149), (287, 65228), (322, 58138), (574, 32614), (644, 29069), (709, 26404), (943, 19852), (1148, 16307), (1418, 13202), (1886, 9926), (2836, 6601), (3772, 4963)]