20785401

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{619}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 37914240

約数和(自身を除く): 17128839

約数列:

[1, 3, 7, 9, 13, 21, 39, 41, 63, 91, 117, 123, 273, 287, 369, 533, 619, 819, 861, 1599, 1857, 2583, 3731, 4333, 4797, 5571, 8047, 11193, 12999, 24141, 25379, 33579, 38997, 56329, 72423, 76137, 168987, 177653, 228411, 329927, 506961, 532959, 989781, 1598877, 2309489, 2969343, 6928467, 20785401]

約数ペア:

[(1, 20785401), (3, 6928467), (7, 2969343), (9, 2309489), (13, 1598877), (21, 989781), (39, 532959), (41, 506961), (63, 329927), (91, 228411), (117, 177653), (123, 168987), (273, 76137), (287, 72423), (369, 56329), (533, 38997), (619, 33579), (819, 25379), (861, 24141), (1599, 12999), (1857, 11193), (2583, 8047), (3731, 5571), (4333, 4797)]