678699

素因数分解:

$3^6\times 7^2\times {\mathrm{19}}^1$

素因数の和:51

約数の個数: 42

約数和(自身を含む): 1246020

約数和(自身を除く): 567321

約数列:

[1, 3, 7, 9, 19, 21, 27, 49, 57, 63, 81, 133, 147, 171, 189, 243, 399, 441, 513, 567, 729, 931, 1197, 1323, 1539, 1701, 2793, 3591, 3969, 4617, 5103, 8379, 10773, 11907, 13851, 25137, 32319, 35721, 75411, 96957, 226233, 678699]

約数ペア:

[(1, 678699), (3, 226233), (7, 96957), (9, 75411), (19, 35721), (21, 32319), (27, 25137), (49, 13851), (57, 11907), (63, 10773), (81, 8379), (133, 5103), (147, 4617), (171, 3969), (189, 3591), (243, 2793), (399, 1701), (441, 1539), (513, 1323), (567, 1197), (729, 931)]