21718521

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{431}}^1\times {\mathrm{509}}^1$

素因数の和:957

約数の個数: 24

約数和(自身を含む): 34369920

約数和(自身を除く): 12651399

約数列:

[1, 3, 9, 11, 33, 99, 431, 509, 1293, 1527, 3879, 4581, 4741, 5599, 14223, 16797, 42669, 50391, 219379, 658137, 1974411, 2413169, 7239507, 21718521]

約数ペア:

[(1, 21718521), (3, 7239507), (9, 2413169), (11, 1974411), (33, 658137), (99, 219379), (431, 50391), (509, 42669), (1293, 16797), (1527, 14223), (3879, 5599), (4581, 4741)]