20872719

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19489}}^1$

素因数の和:19519

約数の個数: 24

約数和(自身を含む): 36485280

約数和(自身を除く): 15612561

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19489, 58467, 136423, 175401, 331313, 409269, 993939, 1227807, 2319191, 2981817, 6957573, 20872719]

約数ペア:

[(1, 20872719), (3, 6957573), (7, 2981817), (9, 2319191), (17, 1227807), (21, 993939), (51, 409269), (63, 331313), (119, 175401), (153, 136423), (357, 58467), (1071, 19489)]