21004731

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{359}}^1$

素因数の和:576

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 13209669

約数列:

[1, 3, 9, 11, 27, 33, 99, 197, 297, 359, 591, 1077, 1773, 2167, 3231, 3949, 5319, 6501, 9693, 11847, 19503, 35541, 58509, 70723, 106623, 212169, 636507, 777953, 1909521, 2333859, 7001577, 21004731]

約数ペア:

[(1, 21004731), (3, 7001577), (9, 2333859), (11, 1909521), (27, 777953), (33, 636507), (99, 212169), (197, 106623), (297, 70723), (359, 58509), (591, 35541), (1077, 19503), (1773, 11847), (2167, 9693), (3231, 6501), (3949, 5319)]