21320559

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{1223}}^1$

素因数の和:1391

約数の個数: 24

約数和(自身を含む): 33415200

約数和(自身を除く): 12094641

約数列:

[1, 3, 9, 13, 39, 117, 149, 447, 1223, 1341, 1937, 3669, 5811, 11007, 15899, 17433, 47697, 143091, 182227, 546681, 1640043, 2368951, 7106853, 21320559]

約数ペア:

[(1, 21320559), (3, 7106853), (9, 2368951), (13, 1640043), (39, 546681), (117, 182227), (149, 143091), (447, 47697), (1223, 17433), (1341, 15899), (1937, 11007), (3669, 5811)]