18090020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1697}}^1$

素因数の和:1760

約数の個数: 48

約数和(自身を含む): 41933808

約数和(自身を除く): 23843788

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 41, 52, 65, 82, 130, 164, 205, 260, 410, 533, 820, 1066, 1697, 2132, 2665, 3394, 5330, 6788, 8485, 10660, 16970, 22061, 33940, 44122, 69577, 88244, 110305, 139154, 220610, 278308, 347885, 441220, 695770, 904501, 1391540, 1809002, 3618004, 4522505, 9045010, 18090020]

約数ペア:

[(1, 18090020), (2, 9045010), (4, 4522505), (5, 3618004), (10, 1809002), (13, 1391540), (20, 904501), (26, 695770), (41, 441220), (52, 347885), (65, 278308), (82, 220610), (130, 139154), (164, 110305), (205, 88244), (260, 69577), (410, 44122), (533, 33940), (820, 22061), (1066, 16970), (1697, 10660), (2132, 8485), (2665, 6788), (3394, 5330)]