20788460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13499}}^1$

素因数の和:13526

約数の個数: 48

約数和(自身を含む): 54432000

約数和(自身を除く): 33643540

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13499, 26998, 53996, 67495, 94493, 134990, 148489, 188986, 269980, 296978, 377972, 472465, 593956, 742445, 944930, 1039423, 1484890, 1889860, 2078846, 2969780, 4157692, 5197115, 10394230, 20788460]

約数ペア:

[(1, 20788460), (2, 10394230), (4, 5197115), (5, 4157692), (7, 2969780), (10, 2078846), (11, 1889860), (14, 1484890), (20, 1039423), (22, 944930), (28, 742445), (35, 593956), (44, 472465), (55, 377972), (70, 296978), (77, 269980), (110, 188986), (140, 148489), (154, 134990), (220, 94493), (308, 67495), (385, 53996), (770, 26998), (1540, 13499)]