20887317

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^2$

素因数の和:198

約数の個数: 36

約数和(自身を含む): 34122816

約数和(自身を除く): 13235499

約数列:

[1, 3, 9, 11, 33, 47, 67, 99, 141, 201, 423, 517, 603, 737, 1551, 2211, 3149, 4489, 4653, 6633, 9447, 13467, 28341, 34639, 40401, 49379, 103917, 148137, 210983, 311751, 444411, 632949, 1898847, 2320813, 6962439, 20887317]

約数ペア:

[(1, 20887317), (3, 6962439), (9, 2320813), (11, 1898847), (33, 632949), (47, 444411), (67, 311751), (99, 210983), (141, 148137), (201, 103917), (423, 49379), (517, 40401), (603, 34639), (737, 28341), (1551, 13467), (2211, 9447), (3149, 6633), (4489, 4653)]