81207560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290027}}^1$

素因数の和:290045

約数の個数: 32

約数和(自身を含む): 208820160

約数和(自身を除く): 127612600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290027, 580054, 1160108, 1450135, 2030189, 2320216, 2900270, 4060378, 5800540, 8120756, 10150945, 11601080, 16241512, 20301890, 40603780, 81207560]

約数ペア:

[(1, 81207560), (2, 40603780), (4, 20301890), (5, 16241512), (7, 11601080), (8, 10150945), (10, 8120756), (14, 5800540), (20, 4060378), (28, 2900270), (35, 2320216), (40, 2030189), (56, 1450135), (70, 1160108), (140, 580054), (280, 290027)]