18405543

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:144

約数の個数: 48

約数和(自身を含む): 29707776

約数和(自身を除く): 11302233

約数列:

[1, 3, 13, 17, 23, 39, 51, 69, 71, 213, 221, 289, 299, 391, 663, 867, 897, 923, 1173, 1207, 1633, 2769, 3621, 3757, 4899, 5083, 6647, 11271, 15249, 15691, 19941, 20519, 21229, 27761, 47073, 61557, 63687, 83283, 86411, 259233, 266747, 360893, 471937, 800241, 1082679, 1415811, 6135181, 18405543]

約数ペア:

[(1, 18405543), (3, 6135181), (13, 1415811), (17, 1082679), (23, 800241), (39, 471937), (51, 360893), (69, 266747), (71, 259233), (213, 86411), (221, 83283), (289, 63687), (299, 61557), (391, 47073), (663, 27761), (867, 21229), (897, 20519), (923, 19941), (1173, 15691), (1207, 15249), (1633, 11271), (2769, 6647), (3621, 5083), (3757, 4899)]