21490020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{119389}}^1$

素因数の和:119404

約数の個数: 36

約数和(自身を含む): 65186940

約数和(自身を除く): 43696920

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 119389, 238778, 358167, 477556, 596945, 716334, 1074501, 1193890, 1432668, 1790835, 2149002, 2387780, 3581670, 4298004, 5372505, 7163340, 10745010, 21490020]

約数ペア:

[(1, 21490020), (2, 10745010), (3, 7163340), (4, 5372505), (5, 4298004), (6, 3581670), (9, 2387780), (10, 2149002), (12, 1790835), (15, 1432668), (18, 1193890), (20, 1074501), (30, 716334), (36, 596945), (45, 477556), (60, 358167), (90, 238778), (180, 119389)]