21246989405

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1\times {\mathrm{487}}^1\times {\mathrm{709}}^1$

素因数の和:1629

約数の個数: 32

約数和(自身を含む): 26476615680

約数和(自身を除く): 5229626275

約数列:

[1, 5, 31, 155, 397, 487, 709, 1985, 2435, 3545, 12307, 15097, 21979, 61535, 75485, 109895, 193339, 281473, 345283, 966695, 1407365, 1726415, 5993509, 8725663, 10703773, 29967545, 43628315, 53518865, 137077351, 685386755, 4249397881, 21246989405]

約数ペア:

[(1, 21246989405), (5, 4249397881), (31, 685386755), (155, 137077351), (397, 53518865), (487, 43628315), (709, 29967545), (1985, 10703773), (2435, 8725663), (3545, 5993509), (12307, 1726415), (15097, 1407365), (21979, 966695), (61535, 345283), (75485, 281473), (109895, 193339)]