20849440

素因数分解:

$2^5\times 5^1\times {\mathrm{311}}^1\times {\mathrm{419}}^1$

素因数の和:745

約数の個数: 48

約数和(自身を含む): 49533120

約数和(自身を除く): 28683680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 311, 419, 622, 838, 1244, 1555, 1676, 2095, 2488, 3110, 3352, 4190, 4976, 6220, 6704, 8380, 9952, 12440, 13408, 16760, 24880, 33520, 49760, 67040, 130309, 260618, 521236, 651545, 1042472, 1303090, 2084944, 2606180, 4169888, 5212360, 10424720, 20849440]

約数ペア:

[(1, 20849440), (2, 10424720), (4, 5212360), (5, 4169888), (8, 2606180), (10, 2084944), (16, 1303090), (20, 1042472), (32, 651545), (40, 521236), (80, 260618), (160, 130309), (311, 67040), (419, 49760), (622, 33520), (838, 24880), (1244, 16760), (1555, 13408), (1676, 12440), (2095, 9952), (2488, 8380), (3110, 6704), (3352, 6220), (4190, 4976)]