20390395

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:279

約数の個数: 24

約数和(自身を含む): 26436384

約数和(自身を除く): 6045989

約数列:

[1, 5, 17, 85, 103, 137, 289, 515, 685, 1445, 1751, 2329, 8755, 11645, 14111, 29767, 39593, 70555, 148835, 197965, 239887, 1199435, 4078079, 20390395]

約数ペア:

[(1, 20390395), (5, 4078079), (17, 1199435), (85, 239887), (103, 197965), (137, 148835), (289, 70555), (515, 39593), (685, 29767), (1445, 14111), (1751, 11645), (2329, 8755)]