278664279

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{1861}}^1$

素因数の和:1991

約数の個数: 32

約数和(自身を含む): 407554560

約数和(自身を除く): 128890281

約数列:

[1, 3, 19, 37, 57, 71, 111, 213, 703, 1349, 1861, 2109, 2627, 4047, 5583, 7881, 35359, 49913, 68857, 106077, 132131, 149739, 206571, 396393, 1308283, 2510489, 3924849, 4888847, 7531467, 14666541, 92888093, 278664279]

約数ペア:

[(1, 278664279), (3, 92888093), (19, 14666541), (37, 7531467), (57, 4888847), (71, 3924849), (111, 2510489), (213, 1308283), (703, 396393), (1349, 206571), (1861, 149739), (2109, 132131), (2627, 106077), (4047, 68857), (5583, 49913), (7881, 35359)]