21001540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{150011}}^1$

素因数の和:150027

約数の個数: 24

約数和(自身を含む): 50404032

約数和(自身を除く): 29402492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 150011, 300022, 600044, 750055, 1050077, 1500110, 2100154, 3000220, 4200308, 5250385, 10500770, 21001540]

約数ペア:

[(1, 21001540), (2, 10500770), (4, 5250385), (5, 4200308), (7, 3000220), (10, 2100154), (14, 1500110), (20, 1050077), (28, 750055), (35, 600044), (70, 300022), (140, 150011)]