21425789

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{313}}^1$

素因数の和:465

約数の個数: 24

約数和(自身を含む): 27491328

約数和(自身を除く): 6065539

約数列:

[1, 7, 11, 49, 77, 127, 313, 539, 889, 1397, 2191, 3443, 6223, 9779, 15337, 24101, 39751, 68453, 168707, 278257, 437261, 1947799, 3060827, 21425789]

約数ペア:

[(1, 21425789), (7, 3060827), (11, 1947799), (49, 437261), (77, 278257), (127, 168707), (313, 68453), (539, 39751), (889, 24101), (1397, 15337), (2191, 9779), (3443, 6223)]