21008820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50021}}^1$

素因数の和:50040

約数の個数: 48

約数和(自身を含む): 67229568

約数和(自身を除く): 46220748

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 50021, 100042, 150063, 200084, 250105, 300126, 350147, 500210, 600252, 700294, 750315, 1000420, 1050441, 1400588, 1500630, 1750735, 2100882, 3001260, 3501470, 4201764, 5252205, 7002940, 10504410, 21008820]

約数ペア:

[(1, 21008820), (2, 10504410), (3, 7002940), (4, 5252205), (5, 4201764), (6, 3501470), (7, 3001260), (10, 2100882), (12, 1750735), (14, 1500630), (15, 1400588), (20, 1050441), (21, 1000420), (28, 750315), (30, 700294), (35, 600252), (42, 500210), (60, 350147), (70, 300126), (84, 250105), (105, 200084), (140, 150063), (210, 100042), (420, 50021)]