20688500

素因数分解:

$2^2\times 5^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:306

約数の個数: 96

約数和(自身を含む): 54093312

約数和(自身を除く): 33404812

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 25, 28, 35, 46, 50, 70, 92, 100, 115, 125, 140, 161, 175, 230, 250, 257, 322, 350, 460, 500, 514, 575, 644, 700, 805, 875, 1028, 1150, 1285, 1610, 1750, 1799, 2300, 2570, 2875, 3220, 3500, 3598, 4025, 5140, 5750, 5911, 6425, 7196, 8050, 8995, 11500, 11822, 12850, 16100, 17990, 20125, 23644, 25700, 29555, 32125, 35980, 40250, 41377, 44975, 59110, 64250, 80500, 82754, 89950, 118220, 128500, 147775, 165508, 179900, 206885, 224875, 295550, 413770, 449750, 591100, 738875, 827540, 899500, 1034425, 1477750, 2068850, 2955500, 4137700, 5172125, 10344250, 20688500]

約数ペア:

[(1, 20688500), (2, 10344250), (4, 5172125), (5, 4137700), (7, 2955500), (10, 2068850), (14, 1477750), (20, 1034425), (23, 899500), (25, 827540), (28, 738875), (35, 591100), (46, 449750), (50, 413770), (70, 295550), (92, 224875), (100, 206885), (115, 179900), (125, 165508), (140, 147775), (161, 128500), (175, 118220), (230, 89950), (250, 82754), (257, 80500), (322, 64250), (350, 59110), (460, 44975), (500, 41377), (514, 40250), (575, 35980), (644, 32125), (700, 29555), (805, 25700), (875, 23644), (1028, 20125), (1150, 17990), (1285, 16100), (1610, 12850), (1750, 11822), (1799, 11500), (2300, 8995), (2570, 8050), (2875, 7196), (3220, 6425), (3500, 5911), (3598, 5750), (4025, 5140)]