18918315

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{443}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 35878752

約数和(自身を除く): 16960437

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 73, 117, 195, 219, 365, 443, 585, 657, 949, 1095, 1329, 2215, 2847, 3285, 3987, 4745, 5759, 6645, 8541, 14235, 17277, 19935, 28795, 32339, 42705, 51831, 86385, 97017, 161695, 259155, 291051, 420407, 485085, 1261221, 1455255, 2102035, 3783663, 6306105, 18918315]

約数ペア:

[(1, 18918315), (3, 6306105), (5, 3783663), (9, 2102035), (13, 1455255), (15, 1261221), (39, 485085), (45, 420407), (65, 291051), (73, 259155), (117, 161695), (195, 97017), (219, 86385), (365, 51831), (443, 42705), (585, 32339), (657, 28795), (949, 19935), (1095, 17277), (1329, 14235), (2215, 8541), (2847, 6645), (3285, 5759), (3987, 4745)]