18459025

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{257}}^1$

素因数の和:310

約数の個数: 36

約数和(自身を含む): 26345412

約数和(自身を除く): 7886387

約数列:

[1, 5, 13, 17, 25, 65, 85, 169, 221, 257, 325, 425, 845, 1105, 1285, 2873, 3341, 4225, 4369, 5525, 6425, 14365, 16705, 21845, 43433, 56797, 71825, 83525, 109225, 217165, 283985, 738361, 1085825, 1419925, 3691805, 18459025]

約数ペア:

[(1, 18459025), (5, 3691805), (13, 1419925), (17, 1085825), (25, 738361), (65, 283985), (85, 217165), (169, 109225), (221, 83525), (257, 71825), (325, 56797), (425, 43433), (845, 21845), (1105, 16705), (1285, 14365), (2873, 6425), (3341, 5525), (4225, 4369)]