19911353

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{11243}}^1$

素因数の和:11284

約数の個数: 16

約数和(自身を含む): 25906176

約数和(自身を除く): 5994823

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 11243, 78701, 123673, 258589, 865711, 1810123, 2844479, 19911353]

約数ペア:

[(1, 19911353), (7, 2844479), (11, 1810123), (23, 865711), (77, 258589), (161, 123673), (253, 78701), (1771, 11243)]