638441769

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{641}}^1\times {\mathrm{1103}}^1$

素因数の和:1797

約数の個数: 32

約数和(自身を含む): 997945344

約数和(自身を除く): 359503575

約数列:

[1, 3, 7, 21, 43, 129, 301, 641, 903, 1103, 1923, 3309, 4487, 7721, 13461, 23163, 27563, 47429, 82689, 142287, 192941, 332003, 578823, 707023, 996009, 2121069, 4949161, 14847483, 30401989, 91205967, 212813923, 638441769]

約数ペア:

[(1, 638441769), (3, 212813923), (7, 91205967), (21, 30401989), (43, 14847483), (129, 4949161), (301, 2121069), (641, 996009), (903, 707023), (1103, 578823), (1923, 332003), (3309, 192941), (4487, 142287), (7721, 82689), (13461, 47429), (23163, 27563)]