18914987

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{271}}^1$

素因数の和:363

約数の個数: 24

約数和(自身を含む): 23892480

約数和(自身を除く): 4977493

約数列:

[1, 7, 13, 59, 91, 169, 271, 413, 767, 1183, 1897, 3523, 5369, 9971, 15989, 24661, 45799, 69797, 111923, 207857, 320593, 1454999, 2702141, 18914987]

約数ペア:

[(1, 18914987), (7, 2702141), (13, 1454999), (59, 320593), (91, 207857), (169, 111923), (271, 69797), (413, 45799), (767, 24661), (1183, 15989), (1897, 9971), (3523, 5369)]