18106821

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{7211}}^1$

素因数の和:7254

約数の個数: 20

約数和(自身を含む): 27924864

約数和(自身を除く): 9818043

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 7211, 21633, 64899, 194697, 223541, 584091, 670623, 2011869, 6035607, 18106821]

約数ペア:

[(1, 18106821), (3, 6035607), (9, 2011869), (27, 670623), (31, 584091), (81, 223541), (93, 194697), (279, 64899), (837, 21633), (2511, 7211)]