18947344

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1283}}^1$

素因数の和:1375

約数の個数: 40

約数和(自身を含む): 40122432

約数和(自身を除く): 21175088

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 71, 104, 142, 208, 284, 568, 923, 1136, 1283, 1846, 2566, 3692, 5132, 7384, 10264, 14768, 16679, 20528, 33358, 66716, 91093, 133432, 182186, 266864, 364372, 728744, 1184209, 1457488, 2368418, 4736836, 9473672, 18947344]

約数ペア:

[(1, 18947344), (2, 9473672), (4, 4736836), (8, 2368418), (13, 1457488), (16, 1184209), (26, 728744), (52, 364372), (71, 266864), (104, 182186), (142, 133432), (208, 91093), (284, 66716), (568, 33358), (923, 20528), (1136, 16679), (1283, 14768), (1846, 10264), (2566, 7384), (3692, 5132)]