18666425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{263}}^1$

素因数の和:457

約数の個数: 24

約数和(自身を含む): 24748416

約数和(自身を除く): 6081991

約数列:

[1, 5, 17, 25, 85, 167, 263, 425, 835, 1315, 2839, 4175, 4471, 6575, 14195, 22355, 43921, 70975, 111775, 219605, 746657, 1098025, 3733285, 18666425]

約数ペア:

[(1, 18666425), (5, 3733285), (17, 1098025), (25, 746657), (85, 219605), (167, 111775), (263, 70975), (425, 43921), (835, 22355), (1315, 14195), (2839, 6575), (4175, 4471)]