20946289

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:217

約数の個数: 32

約数和(自身を含む): 27143424

約数和(自身を除く): 6197135

約数列:

[1, 7, 13, 43, 53, 91, 101, 301, 371, 559, 689, 707, 1313, 2279, 3913, 4343, 4823, 5353, 9191, 15953, 29627, 30401, 37471, 56459, 69589, 207389, 230179, 395213, 487123, 1611253, 2992327, 20946289]

約数ペア:

[(1, 20946289), (7, 2992327), (13, 1611253), (43, 487123), (53, 395213), (91, 230179), (101, 207389), (301, 69589), (371, 56459), (559, 37471), (689, 30401), (707, 29627), (1313, 15953), (2279, 9191), (3913, 5353), (4343, 4823)]