20345080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72661}}^1$

素因数の和:72679

約数の個数: 32

約数和(自身を含む): 52316640

約数和(自身を除く): 31971560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72661, 145322, 290644, 363305, 508627, 581288, 726610, 1017254, 1453220, 2034508, 2543135, 2906440, 4069016, 5086270, 10172540, 20345080]

約数ペア:

[(1, 20345080), (2, 10172540), (4, 5086270), (5, 4069016), (7, 2906440), (8, 2543135), (10, 2034508), (14, 1453220), (20, 1017254), (28, 726610), (35, 581288), (40, 508627), (56, 363305), (70, 290644), (140, 145322), (280, 72661)]