81257215

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{229}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 108501120

約数和(自身を除く): 27243905

約数列:

[1, 5, 13, 53, 65, 103, 229, 265, 515, 689, 1145, 1339, 2977, 3445, 5459, 6695, 12137, 14885, 23587, 27295, 60685, 70967, 117935, 157781, 306631, 354835, 788905, 1250111, 1533155, 6250555, 16251443, 81257215]

約数ペア:

[(1, 81257215), (5, 16251443), (13, 6250555), (53, 1533155), (65, 1250111), (103, 788905), (229, 354835), (265, 306631), (515, 157781), (689, 117935), (1145, 70967), (1339, 60685), (2977, 27295), (3445, 23587), (5459, 14885), (6695, 12137)]