261521013

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{23203}}^1$

素因数の和:23253

約数の個数: 24

約数和(自身を含む): 398923168

約数和(自身を除く): 137402155

約数列:

[1, 3, 13, 17, 39, 51, 221, 289, 663, 867, 3757, 11271, 23203, 69609, 301639, 394451, 904917, 1183353, 5127863, 6705667, 15383589, 20117001, 87173671, 261521013]

約数ペア:

[(1, 261521013), (3, 87173671), (13, 20117001), (17, 15383589), (39, 6705667), (51, 5127863), (221, 1183353), (289, 904917), (663, 394451), (867, 301639), (3757, 69609), (11271, 23203)]