208540865

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1289}}^1$

素因数の和:1457

約数の個数: 32

約数和(自身を含む): 286070400

約数和(自身を除く): 77529535

約数列:

[1, 5, 13, 19, 65, 95, 131, 247, 655, 1235, 1289, 1703, 2489, 6445, 8515, 12445, 16757, 24491, 32357, 83785, 122455, 161785, 168859, 318383, 844295, 1591915, 2195167, 3208321, 10975835, 16041605, 41708173, 208540865]

約数ペア:

[(1, 208540865), (5, 41708173), (13, 16041605), (19, 10975835), (65, 3208321), (95, 2195167), (131, 1591915), (247, 844295), (655, 318383), (1235, 168859), (1289, 161785), (1703, 122455), (2489, 83785), (6445, 32357), (8515, 24491), (12445, 16757)]