19910247

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1297}}^1$

素因数の和:1367

約数の個数: 32

約数和(自身を含む): 32896512

約数和(自身を除く): 12986265

約数列:

[1, 3, 7, 17, 21, 43, 51, 119, 129, 301, 357, 731, 903, 1297, 2193, 3891, 5117, 9079, 15351, 22049, 27237, 55771, 66147, 154343, 167313, 390397, 463029, 948107, 1171191, 2844321, 6636749, 19910247]

約数ペア:

[(1, 19910247), (3, 6636749), (7, 2844321), (17, 1171191), (21, 948107), (43, 463029), (51, 390397), (119, 167313), (129, 154343), (301, 66147), (357, 55771), (731, 27237), (903, 22049), (1297, 15351), (2193, 9079), (3891, 5117)]