21810040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77893}}^1$

素因数の和:77911

約数の個数: 32

約数和(自身を含む): 56083680

約数和(自身を除く): 34273640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77893, 155786, 311572, 389465, 545251, 623144, 778930, 1090502, 1557860, 2181004, 2726255, 3115720, 4362008, 5452510, 10905020, 21810040]

約数ペア:

[(1, 21810040), (2, 10905020), (4, 5452510), (5, 4362008), (7, 3115720), (8, 2726255), (10, 2181004), (14, 1557860), (20, 1090502), (28, 778930), (35, 623144), (40, 545251), (56, 389465), (70, 311572), (140, 155786), (280, 77893)]