20828500

素因数分解:

$2^2\times 5^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{541}}^1$

素因数の和:578

約数の個数: 96

約数和(自身を含む): 56818944

約数和(自身を除く): 35990444

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 50, 55, 70, 77, 100, 110, 125, 140, 154, 175, 220, 250, 275, 308, 350, 385, 500, 541, 550, 700, 770, 875, 1082, 1100, 1375, 1540, 1750, 1925, 2164, 2705, 2750, 3500, 3787, 3850, 5410, 5500, 5951, 7574, 7700, 9625, 10820, 11902, 13525, 15148, 18935, 19250, 23804, 27050, 29755, 37870, 38500, 41657, 54100, 59510, 67625, 75740, 83314, 94675, 119020, 135250, 148775, 166628, 189350, 208285, 270500, 297550, 378700, 416570, 473375, 595100, 743875, 833140, 946750, 1041425, 1487750, 1893500, 2082850, 2975500, 4165700, 5207125, 10414250, 20828500]

約数ペア:

[(1, 20828500), (2, 10414250), (4, 5207125), (5, 4165700), (7, 2975500), (10, 2082850), (11, 1893500), (14, 1487750), (20, 1041425), (22, 946750), (25, 833140), (28, 743875), (35, 595100), (44, 473375), (50, 416570), (55, 378700), (70, 297550), (77, 270500), (100, 208285), (110, 189350), (125, 166628), (140, 148775), (154, 135250), (175, 119020), (220, 94675), (250, 83314), (275, 75740), (308, 67625), (350, 59510), (385, 54100), (500, 41657), (541, 38500), (550, 37870), (700, 29755), (770, 27050), (875, 23804), (1082, 19250), (1100, 18935), (1375, 15148), (1540, 13525), (1750, 11902), (1925, 10820), (2164, 9625), (2705, 7700), (2750, 7574), (3500, 5951), (3787, 5500), (3850, 5410)]