81428945

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{131}}^2$

素因数の和:353

約数の個数: 24

約数和(自身を含む): 107493288

約数和(自身を除く): 26064343

約数列:

[1, 5, 13, 65, 73, 131, 365, 655, 949, 1703, 4745, 8515, 9563, 17161, 47815, 85805, 124319, 223093, 621595, 1115465, 1252753, 6263765, 16285789, 81428945]

約数ペア:

[(1, 81428945), (5, 16285789), (13, 6263765), (65, 1252753), (73, 1115465), (131, 621595), (365, 223093), (655, 124319), (949, 85805), (1703, 47815), (4745, 17161), (8515, 9563)]