81535820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1\times {\mathrm{547}}^1$

素因数の和:842

約数の個数: 48

約数和(自身を含む): 178143840

約数和(自身を除く): 96608020

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 257, 290, 514, 547, 580, 1028, 1094, 1285, 2188, 2570, 2735, 5140, 5470, 7453, 10940, 14906, 15863, 29812, 31726, 37265, 63452, 74530, 79315, 140579, 149060, 158630, 281158, 317260, 562316, 702895, 1405790, 2811580, 4076791, 8153582, 16307164, 20383955, 40767910, 81535820]

約数ペア:

[(1, 81535820), (2, 40767910), (4, 20383955), (5, 16307164), (10, 8153582), (20, 4076791), (29, 2811580), (58, 1405790), (116, 702895), (145, 562316), (257, 317260), (290, 281158), (514, 158630), (547, 149060), (580, 140579), (1028, 79315), (1094, 74530), (1285, 63452), (2188, 37265), (2570, 31726), (2735, 29812), (5140, 15863), (5470, 14906), (7453, 10940)]