215210515

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{257}}^1\times {\mathrm{991}}^1$

素因数の和:1279

約数の個数: 24

約数和(自身を含む): 281017728

約数和(自身を除く): 65807213

約数列:

[1, 5, 13, 65, 169, 257, 845, 991, 1285, 3341, 4955, 12883, 16705, 43433, 64415, 167479, 217165, 254687, 837395, 1273435, 3310931, 16554655, 43042103, 215210515]

約数ペア:

[(1, 215210515), (5, 43042103), (13, 16554655), (65, 3310931), (169, 1273435), (257, 837395), (845, 254687), (991, 217165), (1285, 167479), (3341, 64415), (4955, 43433), (12883, 16705)]